When you want to see if a library has the book you want, you can use the catalogue(目录) in the Library. Most catalogues of books in a library take the form of small cards kept in boxes. One way of arranging (排列) the cards is in ABC order by the family names of the writers.
Catalogue cards usually give the following important information: (1 )the name of the writer, (2)the shelf-n k(架号) ,that is ,the Dewev number which helps people to find where the books are, (3) the title of the book, (4)the year of publication and the publisher, and (5)the number of pages in the book.
1．if you know the title of a book and want to find out if it is in the catalogue, what else do you need to know?
A. The shelf-mark. B. The name of the writer.
C. The Dewey number. D. The year of publication.
2. Which of the following is the kind of catalogue card described in the text?
A. 428.65 Brooks,J.and Grundy,P.Writing for Study PurposesCambridge University I ‘ns~(1954) 78pp
B. 783.25 The best bookfor writing practicePractical Writing (1965) 213pp
C.315.08 Reading Skills Beijing University Press (1990) 160pp
D.921 .87 Smith, J Practical ReachingThe People’s Publishing House (1989)
In the 19th century England people liked to go to the seaside. In those days, ladies wore long bathing dresses, and men wore bathing suits. Women did not walk about on the beach in their bathing dresses. They hired a bathing machine. A bathing machine was used for changing in, and for taking the bather down to the sea. It cost 2 pence to hire a machine and an attendant (f~ ~). When she had paid, the bather climbed up the back steps and got into the bathing machine. Then she changed into her bathing dress. When she had changed , the machine was pulled down to the sea. The bathing machine stopped in the water and the bather went down the front steps into the water. If she did not want to get into the sea, the attendant pulled her in.
1. Who used the bathing machine?
A. Women bathers.
B. Both men and women bathers.
C. Bathers who couldn’t swim.
D. Bathers who couldn’t walk.
2. A bathing machine was mainly used for
A. giving the bather a pleasure ride on the beach
B. giving the bather some exercise before getting into the water
C. protecting the bather from catching cold from the sea wind
D. protecting the bather from being seen in bathing dress out of water
3. In the 19th century people who used the bathing machine usually did the following things. Which is the right order for doing them?
a. Changing into bathing clothes
b. Getting out of the bathing machine
c. Paying 2 pence
d. Getting into the bathing machine
e. Being taken down the beach
f. Getting into the water
A. e,d,a,b,f,c B. c,d,a,e,b,f
C. c,d,e,a,b,f D. d,a,e,b,f,c
Imagine being able to recall just about anything, your mind functioning as a nearly endless encyclopedic（百科全书的）book of names, pictures, dates and events.
Brad Williams’ excellent memory recall makes him a personified version（个人版）of Google. His wide memory allows him to recall almost any news event and anything he has experienced, including specific dates and even the weather. “I was sort of a human Google for my family. I’ve always been able to recall things,” the 51-yearold said on Good Morning America in his first television interview.
Williams’ type of detailed, complete memory is called hyperthymesia and few known cases exist. Brad’s brain scan are now being studied by scientists at the Center for Neurobiology（神经生物学）of Learning and Memory, at the University of California.
At first, the drive-time radio broadcaster didn’t think his ability to recall so much was anything special. Gradually, over the years, other people noticed how much he was able to remember in detail about events. Then in 2006, he read an article about a wman whom scietists called AJ, which prompted Williams to come forward. AJ is a writwer of a medical journal, and the only scientifically-documented case of superior memory.
“When I read about AJ, my immediate thought was : Oh my God. That’s Brad!” said williams’ brother, Eric Williams.
Eric Williams is eager to learn about the inner working of his brother’s mind. He is in the process of making documentary（纪录片）about Brad, appropriately titled: “Unforgettable.” In the film, which hasn’t been finished yet, Williams takes on a person who is Googling answers to 20 questions. He answers 18 of them correctly and is 11 minutes faster than the Google user.
“All of us have the ability to store this information, but the difference with Brad is that he can recall it,” Eric Williams said.According to the passage, which of the following is true about Brad Williams?
| A．He has worked for Google, so he recall any news events. |
| B．He may be one of the rare cases of people with a superior memory. |
| C．He is now the host of Good Morning America. |
| D．He is working as a teacher in California. |
Why does Brad Williams have such a good memory?
| A．Because he was born with a rare ability. |
| B．Because his work requires a good memory. |
| C．Because he has to answer others’ questions. |
| D．Because he was specially trained in his chilhood. |
The underlined word “prompted” most probably means _______.
| A．helped | B．wanted | C．warned | D．encouraged |
The best title for this passage might be ___________.
| A．The Ability to Store All Information |
| B．A Documentary called Unforgettable |
| C．“Google Man” Recalls Nearly Every Thing |
| D．Brad Williams and Google User |
Active vacations are often the most relaxing of all. But Wait! It's all in defining what an active vacation is. We don't expect you to take up jogging, backpacking, or hang gliding. we ask the sedentary（爱坐的）vacationers to spend two to four hours a day doing things, such as walking the city streets, exploring a nature preserve, or taking a leisurely rowboat ride.
These kinds of activities aren't just good for your physical health. They improve your mental health, even your spiritual health. And they make vacations memorable and worthwhile. Here are some fresh ideas for active and healthy vacation.
Make the morning your activity time. At that time it is most likely that the weather will be friendlier, your energy level higher, and your schedule emptier than later in the day.
Have a walk at dawn or dusk. Such activity is called rejuvenation（恢复活力）. Try to make this a daily routine of life away from home, and you will guarantee yourself both physical and spiritual youth.
Get into the water as much as you can. Don't allow yourself to spend your entire time sitting in front of the water. Whether it is the ocean, a swimming pool, or a tree-lined lake, make sure you get into the water for swimming or games or even walking. Merely standing in waist-high water is a good workout, thanks to the action of the water. And you'll feel so much more alive!
Choose a cruise for your trip. It's amazing how active you can be being stuck on a boat in the middle of the Atlantic. Most cruise ships offer numerous options for seaworthy exercise. During your sea and land trips you can burn calories as you swim, hike, dive, and horseback ride.
Get out of the car every two hours. Many of us spend a large part of our vacations on the road, either getting to and from our destinations, or using the car for sightseeing. But no matter how beautiful the scenery is, great and memorable vacations don't happen in a car seat. Don't wait for tiredness or nature's call to get you to pull over. Frequently get out and stretch, walk, picnic, shop, visit, and have fun. It's important for your health and energy, and it makes traveling a lot more active and interesting.The first paragraph mainly tells us ____________.
| A．that active vacations are very relaxing |
| B．the activities we should join in |
| C．how many hours we should exercise every day |
| D．what an active vacations is |
How many tips does the writer give in the passage?
| A．Three | B．Four | C．Five | D．Six |
Which of the following is WRONG according to the passage?
| A．Usually the weather in the morning is better. |
| B．You can have a memorable vacation in a car. |
| C．Swimming can make you feel much more alive. |
| D．Don’t drive your car very often to go sightseeing. |
Which of the following is probably the best title for this passage?
| A．Driving Tips | B．How to Relax Without cars |
| C．Give up Your Car and Walk | D．Make your Vacation Healthy |
Hey there,
So you’re about to spend four years of your life and tens of dollars of your parents’ money, and all you really know about college is that all of your friends are going. Do you ever stop to wonder why you’re going?
Relax. You’re making the right decision. First of all, you’ll discover what interests you by taking courses in many subjects. For example, it’s hard to decide if you want to be a painter if you’ve never painted any pictures; once you’re in a drawing-room on campus, you’ll know one way or the other. College is also a lot of fun — after you graduate, you’ll be working every weekday for 50 or so years. And remember that college graduate earn about twice the income of those who never attended college.
Finding the right college can be difficult. Fortunately, Johnson Review is here to help you every step of the way.
* Researching Schools. To us. the most important decision you’ll make is to choose the school that really fits you best — not the once that is the most competitive（有竞争力的）or has the best-equipped rooms.
* Applying to School. On JohnsonReview.com. you’ll find hundreds of actual college application（申请）and links to many more.
* Raising Your Scores. American College Test is one of the most difficult parts of the admission（录取）course. It’s not the most important, though, and not everyone needs to prepare for the best. But, if you can do better, find the right course for better scores.
*Paying for School. Most families need financial aid for the high cost of college. The problem is that financial aid seems difficult to get and many families get caught up in the price of college rather than learning the ways to get financial aid. If you really do your research, you’ll learn that you can afford to attend any college, no matter the cost.
For more information, call 600-3681 or visit JohnsonReview.com. Wherever you go. have a nice trip !
Johnson Smith
Founder and CEO
Johnson Review
1.How many reasons for going to college does the author mention in the text?
A. 2 B. 3 C. 4 D. 5
2.The author thinks you should choose the college that is .
A. well-equipped B. competitive C. suitable D. famous
3.What does the author advise you to do to pay the high cost of college ?
A. To ask the family for help. B. To make a study of financial courses.
C. To do research on the price of college D. To get to know how to ask for financial aid.
4.What’s the author’s purpose of writing this text.?
A. To suggest ways to prepare for college learning.
B. To help readers find the right college.
C. To make Johnson Review popular.
D. To introduce college life.
5.Where may the article be taken from?
A. A Journalist Book B. A Travel Book C. A Grammar Book D. An Advice Book
Everybody has to buy or sell things sometimes. Even students who are usually not very rich, have to learn something about making purchases intelligently. As a student, you may find, for example, that you need to a walkman or winter clothing. You may want to buy a television or a used car. Of course, you want to get good value for your money. If you are considering a major purchase, or any purchase you should remember several important things.
※Study first, and then decide what to buy. You can learn a lot just by reading books and advertisements.
Remember that a high quality product will probably last longer and work better. Of course, for a superior product you are expected to pay more. An inferior product may not give you the same quality, but the price could be low. A poor quality product could be expensive and a valuable one could be on sale at a greatly reduced price.
※Don’t worry. Take your time. After you decide what product you want to buy, go to many different stores. If you cannot find the product you want, you try to order it directly from the factory or ask the store to order it for you.
Look for a good deal. If you wait, you may probably find that your product will go on sale and you may be able to save 10,20, or even 50 percent of the original price.
Finally, before you buy, make sure that that product is guaranteed. If you find the lowest possible price, you will generally be happy with your purchase and also keep more money in the bank.Which of the following should you care more while shopping?
| A．The price of the product | B．The information of the product |
| C．The size of the product | D．The quality of the product |
According to the writer, waiting before shopping probably means_____.
| A．saving money | B．wasting money |
| C．losing the product | D．wasting time |
If you want to have a good purchase, you should do all the following except ____
| A．getting enough information about the product |
| B．taking your friend’s advice |
| C．making sure about the guarantee of the product |
| D．waiting until the proper time |
The main purpose of the passage is to tell us that ____.
| A．how to find the product you want |
| B．how to have a good purchase |
| C．how to save money |
| D．how to buy product with high quality. |
I entered high school having read hundreds of books. But I was not a good reader. Merely bookish, I lacked a point of view when I read. Rather, I read in order to get a point of view. I searched books for good expressions and sayings, pieces of information, ideas, themes—anything to enrich my thought and make me feel educated. When one of my teachers suggested to his sleepy tenth-grade English class that a person could not have a "complicated (复杂的) idea" until he had read at least two thousand books, I heard the words without recognizing either its irony (嘲讽) or its very complicated truth. I merely determined to make a list of all the books I had ever read. Strict with myself, I included only once a title I might have read several times. ( How, after all, could one read a book more than once?) And I included only those books over a hundred pages in length. ( Could anything shorter be a book?)
There was yet another high school list I made. One day I came across a newspaper article about an English professor at a nearby state college. The article had a list of the "hundred most important books of Western Civilization. " "More than anything else in my life," the professor told the reporter with finality , " these books have made me all that I am . " That was the kind of words I couldn’t ignore (忽视). I kept the list for the several months it took me to read all of the titles. Most books, of course, I hardly understood. While reading Plato's The Republic, for example, I needed to keep looking at the introduction of the book to remind myself what the text was about. However, with the special patience and superstition (迷信) of a schoolboy, I looked at every word of the text. And by me time I reached the last word, pleased, I persuaded myself that I had read The Republic, and seriously crossed Plato off my list.On hearing the teacher's suggestion of reading, the writer thought________.
| A．one must read as many books as possible |
| B．a student should not have a complicated idea |
| C．it was impossible for one to read two thousand books |
| D．students ought to make a list of the books they had read |
While at high school, the writer________.
| A．had plans for reading | B．learned to educate himself |
| C．only read books over 100 pages | D．read only one book several times |
The underlined phrase "with finality" probably means
| A．firmly | B．clearly | C．proudly | D．pleasantly |
The writer's purpose in mentioning The Republic is to________.
| A．explain why it was included in the list |
| B．describe why he seriously crossed it off the list |
| C．show that he read the books blindly though they were hard to understand |
| D．prove that he understood most of it because he had looked at every word |
The writer provides two book lists to ________.
| A．show how he developed his point of view |
| B．tell his reading experience at high school |
| C．introduce the two persons' reading methods |
| D．explain that he read many books at high school |
You are watching a film in which two men are having a fight. They hit one another hard. At the start they only fight with their fists. But soon they begin hitting one another over the heads with chairs. And so it goes on until one of the men crashes (撞击) through a window and falls thirty feet to the ground below. He is dead！Of course he isn't really dead. With any luck he isn't even hurt. Why? Because the men who fall out of high windows or jump from fast moving trains, who crash cars or even catch fire, are professionals (专业人士). They do this for a living. These men are called stuntmen. That is to say, they perform tricks. There are two sides to their work. They actually do most of the things you see on the screen. For example, they fall from a high building. However, they do not fall on to hard ground but on to empty cardboard boxes covered with a mattress (床垫). Again, when they hit one another with chairs, the chairs are made of soft wood and when they crash through windows, the glass is made of sugar! But although their work depends on trick of this sort, it also requires a high degree of skill and training. Often a stuntman' s success depends on careful timing. For example, when he is "blown up" in a battle scene, he has to jump out of the way of the explosion just at the right moment.
Naturally stuntmen are well paid for their work, but they lead dangerous lives. They often get seriously injured, and sometimes killed. A Norwegian stuntman, for example, skied over the edge of a cliff a thousand feet high. His parachute (降落伞) failed to open, and he was killed. In spite of all the risks, this is no longer a profession for men only. Men no longer dress up as women when actresses have to perform some dangerous action, for nowadays there are stunt girls too!Stuntmen are those who ______.
| A．often dress up as women |
| B．prefer to lead dangerous lives |
| C．often perform seemingly (表面上) dangerous actions |
| D．often fight each other for their lives |
Stuntmen earn their living by ______.
| A．playing their dirty tricks | B．selling their special skills |
| C．jumping out of high windows | D．jumping from fast moving trains |
When a stuntman falls from a high building, ______.
| A．he needs little protection |
| B．he will be covered with a mattress |
| C．his life is endangered |
| D．his safety is generally all right |
Which of the following is the main factor (因素) of a successful performance?
| A．Strength. | B．Exactness. | C．Speed. | D．Power. |
What can be inferred from the author' s example of the Norwegian stuntman?
| A．Sometimes an accident can occur to a stuntman. |
| B．The percentage of serious accidents is high. |
| C．Parachutes must be of good quality. |
| D．The cliff is too high. |
Whenever you send a letter or a postcard，you have to put stamps on the envelope or on the card．When did people first begin to use stamps?Who was thefirst to think of this idea?
In the early nineteenth century，people did not use stamps．They had to pay postag
e when they receive letters．They unhappy about this，especially whenthey pay for a letter which they did not wish to receive at a11．The postage was high at that time，because the post offices had to send many people to cotlem the postage．
RowIand Hill，a schoolnlaster in England，was the first to put forward aproposal to use stamps in the 50s of the nineteenth century．fie thought it wouldbe much easier for people to use stamps to coover postage．They could go to the nearby post office to buy stamps and put them on envelopes before they sent theletters，The post office simply put seals on the stamps so that people could notuse the staraps again．In this way，the post office did not need to send postmen tocollect postage．It only needed to send fewer postmen to deliver letters．’That was a good idea and the governmern finally accepted it．It was not until that people began to use stamps．
A．!he early 19th Century B．the middle 19th century
C．the late 19th century I)．the beginning of the 19th centuryBefore stamps were used，postage ．
| A．was paid by the letter—posters | B．was paid by the letter—receivers |
| C．was collected by postmen | D．BothBand C |
After stamps were used，post offices needn’t
| A．send postmen to collect the postage |
| B．send postmen to collect letters |
| C．send postmen to deliver jetters |
| D．put seals on the used stamps |
Which of the following may be the best title of the passage?
| A．When did people first begin to use stamps? |
| B．Who was the first to think of using stamps? |
| C．Why were postmen sent to collect postage? |
| D．How did stamps come Into use? |
Among various programs, TV talk shows have covered every inch of space on daytime television. And anyone who watches them regularly knows that each one is different in style. But no two shows are more opposite in content, while at the same time standing out above the rest, than the Jerry Springer and Oprah Winfrey shows.Jerry Springer could easily be considered the king of "rubbish talk". The topics on his show are as surprising as can be. For example, the show takes the ever-common talk show titles of love, sex, cheating, and hate, to a different level. Clearly, the Jerry Springer show is about the dark side of society, yet people are willing to eat up the troubles of other people's lives.
Like Jerry Springer, Oprah Winfrey takes the TV talk show to its top. But Oprah goes in the opposite direction. The show is mainly about the improvement of society and different quality of life. Contents are from teaching your children lessons, managing your work week, to getting to know your neighbors.
Compared to Oprah, the Jerry Springer show looks like poisonous waste being poured into society. Jerry ends every show with a "final word". He makes a small speech about the entire idea of the show. Hopefully, this is the part where most people will learn something very valuable.
Clean as it is, the Oprah show is not for everyone. The show's main audience are middle-class Americans. Most of the people have the time, money and ability to deal with life's tough problems. Jerry Springer, on the other hand, has more of a connection with the young adults of society. These are 18-to 21year-olds whose main troubles in life include love, relationship, sex, money and drug. They are the ones who see some value and lessons to be learned through the show's exploitation.Compared with other TV talk shows, both the Jerry Springer and the Oprah Winfrey shows are____.
| A．more interesting | B．unusually poplar | C．more detailed | D．more formal |
Though the social problems Jerry Springer talks about appear unpleasant, people who watch the shows ______.
| A．show disbelief in them | B．are ready to face up to them |
| C．remain cold to them | D．are willing to get away from them |
Which of the following is likely to be a topic of the Oprah Winfrey show?
| A．A new type of robot. | B．National hatred. |
| C．Family income planning. | D．Street accident. |
We can learn from the passage that the two talk shows ____.
| A．have become the only ones of its kind | B．exploit the weaknesses in human nature |
| C．appear at different times of the day | D．attract different people |
What is the advantage of the Jerry Springer show?
| A．The show exposes the dark sides of society. | B．The show pours poisonous waste into society. |
| C．Jerry sums up the whole idea of the show. | D．Jerry talks abou the improvement of society. |
When the musical sound rings you, you immediately reach for your pocket ready to have a chat. But although you probably use it all the time, have you ever stopped to think about the manners related to talking on the phone? If you haven’t, here are some tips to guide you.
●Always give the person you are calling plenty of time to get to the phone before you hang up. If the person who answers is not the one you want，give your name and ask if you may speak to the person you want.
●Think about the time you call people. Try not to call too early in the morning(before about 9:00)or too late at night(after about 9:30). Also try not to call at mealtimes.
●If you go by plane to visit your relatives at Christmas, remember to follow airline instructions. Cell phones must be turned off as soon as the plane doors are closed and remain so until the doors open again on arrival.
●When face to face with someone, do not talk on the phone. It is rude to be on the phone when a waiter is trying to take your order in a restaurant, or when you are returning the shoes you have just been trying on in a shop. Finish any face-to-face business before taking a call. Continuing to use the phone while nodding to the person in front of you is quite impolite.
●When in a restaurant with your friends，keep phone conversations short. Make a call only if it is important. Practise speaking in a low voice. If no one looks your way, you’ve got it.
●If you go to a theatre, a concert or a cinema, consider the other people around you. Check that your phone is “off” before you enter. If you are expecting a very important call, put your phone on “vibrate”(振动)and run for the exit as soon as you feel it. If you forget both “off” and “vibrate” and your phone rings, don’t answer it, turn it off straight away.Which is true according to the passage above?
| A．You may call people anytime as you like. |
| B．You may talk loudly on the phone at dinner in the restaurant. |
| C．You may keep on talking on the phone while greeting somebody. |
| D．You may call people as soon as you get on the plane，but not after the doors are closed. |
We may infer from these tips that__________.
| A．some people don’t pay much attention to manners while making cell phone calls |
| B．you may ask to leave a message unless the person you are calling is in |
| C．calling people too early or too late in the morning is not polite |
| D．almost everyone has got a cell phone |
What does the underlined sentence “…you’ve got it” mean in the passage?
| A．You have succeeded in making a call without disturbing others. | |
| B．You have made the phone call brief and interesting. | |
| C．You’ve got the message you are waiting for. | D．You have made a phone call secretly． |
From the tips given above, we can decide the writer is sure to share the opinion that______.
| A．1ike the saying “clothes make a man”, nowadays cell phones make a man | |
| B．as the old saying goes, money talks; nowadays cell phones talk | |
| C．the way we use the cell phones tells what we are like | D．we are what cell phones we use |
We know that many animals do not stay in one place.Birds,fish and other animals move from one place to another at a certain time.They move for different reasons:most of them move to find food more easily,but others move to get away from places that are too crowded.
When cold weather comes,many birds move to warmer places to find food.Some fishes give birth in warm water and move to cold water to feed.The most famous migration（迁移）is probably the migration of fish,which is called “Salmon”.This fish is born in fresh water but it travels many miles to salt water.There it spends its life.When it is old,it returns to its birthplace in fresh water.Then it gives birth and dies there.In northern Europe,there is a kind of mouse.They leave their mountain homes when they become too crowded.They move down to the low land.Sometimes they move all the way to the seaside,and many of them are killed when they fall into the sea.
Recently,scientists have studied the migration of a kind of lobster（龙虾）.Every year,when the season of bad weather arrives,the lobsters get into a long time and start to walk across the floor of the ocean.Nobody knows why they do this,and nobody knows where they go.
So,sometimes we know why humans and animals move from one place to another,but at other times we don’t.Maybe living things just like to travel.Most animals move from one place to another at a certain time to _________.
| A．give birth | B．enjoy warmer water |
| C．find food more easily | D．find beautiful places |
The mice in northern Europe move when _________.
| A．they give birth | B．the weather is bad |
| C．the place gets too crowded | D．they haven’t enough food |
The lobsters move _________.
| A．to the fresh water | B．to the deeper sea |
| C．at a certain time | D．to find more food |
How many coins have you got in your pocket right now?Three?Two?Or one?With a phonecard you can make up to 200 calls without any change at all.
1.What do you do with it?
Go to a telephone box marked “Phonecard”.Put in your card,make your call and when you've finished,a screen tells you how much is left on your card.It costs no extra for the cards,and the calls cast 10 per unit,the same as any other payphone call.You can put them in units of 10,20,40,100 or 200.
2.Now appearing in a shop near you
Near each card phone place you'll find a shop where you can buy one.They're at bus,train and city tube stations.Many universities,hospitals and clubs,restaurants and gas stations on the highway and shopping centers.At airports and seaports.
3.No more broken payphones
Most broken payphones are like that they've been vandalized（破坏了的）.There are no coins in Cardphone to excite thieves' interest in it.So you're not probably to find a vandalized one.Get a phonecard yourself and try it out.Or get a bigger wallet.There are three sections in the passage.Which section do you think is about why phonecards are good?
| A．Section 1. | B．Section 2. | C．Section 3. | D．Section 1&2. |
Choose the right order of the steps under“How to use a phonecard”.
a.Put in your phonecard.
b.Look at the screen to find out how many calls you can still make.
c.Go to a telephone box marked “Phonecard”.
d.Make your call.
| A．a,b,c,d | B．c,a,d,b | C．a,d,c,b | D．c,d,a,b |
The last sentence “Or get a bigger wallet”means“_________”.
| A．Phonecards are cheap |
| B．You cannot use all payphones |
| C．Thieves will not break card phones |
| D．People do not like carrying a lot of coins |
Snow-melting Agent
A heavy snow can kill pests and this means a good harvest next year.This will bring as well as trouble to urbanites.
On Nov.16,2003,a cold air current brought a heavy snow to Beijing.To prevent traffic jams,related government departments mobilized people to clear off snow on streets.
One of the most effective ways to clear off snow on roads is to scatter snow-melting agent on the roads.The major component of the snow-melting agent is salt.The snow-melting agent can make snow stop from freezing,make it easier to clear off the road,and allow traffic to flow smoothly.But it also brings about some hidden dangers.In the spring of 2003,over 300 000 trees in Beijing urban districts died.After analyzing soil around these trees,experts discovered that the salt content of these soils was 392 times higher than normal.Where did the excessive salt come from?After investigating,forestry experts found that when clearing snow in the winter,people usually heap snow containing snow-melting agent at trees’ roots,and that when the snow melts,this agent penetrates the soil and increases its salt content.The snow-melting agent indirectly killed the trees.
Statistics show that during a heavy snow in 2002,over 1000 tons of snow-melting agent was scatterred on streets in Beijing.Snow water containing a large amount of snow-melting agent got into the soil through sewers.
In addition,salt in the snow-melting agent can expedite the corrosion of steel bars in concrete buildings and cause the concrete to crack and peel,shortening the life of roads.
Scientists and government officials are required to solve traffic problems caused by heavy snows as soon as possible and at the same time try to reduce the negative effects of the snow-melting agent.This is a difficult problem placed before them.Related authorities have framed some local criteria to regulate the production and use of snow-melting agents.
Now,more harmless snow-melting agents are being developed.Now that even snow-melting agents that meet today’s criteria must still be used carefully,we have to rely more on our manpower and machines to clear off snow.
This year,in addition to using snow-melting agents,Beijing will use a large number of snow vehicles to clear snow on roads.In more places,citizens are mobilized to clear snow with their hands.This may be a test of a city’s civilization level.Salt is a snow-melting agent while _________ is a cleaning agent.
| A．water | B．soap | C．a washing-machine | D．a housewife |
The third paragraph of the text is mainly about _______.
| A．the side effect of snow-melting agent |
| B．a case of damage to trees caused by snow-melting agent |
| C．the results of using snow-melting agent |
| D．the uses of snow-melting agent |
According to the text,the most practical way to clear off snow is to _________.
| A．use snow-melting agent as much as possible |
| B．only use more harmless snow-melting agent |
| C．encourage people to clear snow with their hands |
| D．use more snow vehicles |
This text most probably appears in_________.
| A．a newspaper | B．a magazine on latest findings |
| C．a book on salt | D．a magazine on environmental protection |
Though “nanometer” is now a fashionable term all over the world,few people know exactly what it is.It has become a new favorite of manufacturers and sellers in recent years.Many “high-tech” products bearing the name “nano” have entered the market,bringing more mysterious feeling to surprised consumers.
Nanometer is a very small length unit of measure,and is very small.One millimeter is 1000 micrometers,and one micrometer is 1000 nanometers.That is,one nanometer is one billionth of a meter.Nano materials are solid materials composed of particles or crystallites of less than 100 nanometer in size.Then,is a cup made of nano material really any different from an ordinary cup in function as far as how it works?
Are nano cups really so wonderful?A reporter went to the Institute of Nanomedicine,which is the first such institute of such a sort in the world and the only one in China,specializing in researching the investigation of the application of nano technology into medicine.
Ji(director Institute of Nanomedicine):
A water molecule is composed of 2 hydrogen atoms and 1 oxygen atom.It can be alterchanged only by special manipulation of the atoms.The material constituting the cup can have a nanometer particles size of the nano level.But it cannot change the chemical and physical properties of the water contained in it.The water in the cup is still water.When people drink it,it will produce no special effect on human body.
Prof.Ji told the reporter,so far,the investigation of nano materials is still confined in the laboratory.No commercial micro products can be produced yet.With the present level of science and technology,the time of everyday goods age of daily use articles made of nanometer materials is still years away.
The commodities labeled with nano marks in the market now are only traditional products coated with a thin layer of nanometer material,which makes them more abrasion resistant,much easier to be cleaned,or oil repelling or moth proof.
Prof.Ji explained that nano cup is a real cup.It can also be included in the list of nano products in a certain sense.But the nano cup has not changed its property and function as a cup.It is not a magical medicine for curing and health care.Which of the following shows the right relationship?
| A．nanometer<millimeter<micrometer<meter |
| B．nanometer<micrometer<millimeter<meter |
| C．micrometer<millimeter<nanometer<meter |
| D．millimeter<micrometer<nanometer<meter |
The underlined part in the last second paragraph but one is about_________.
| A．the strong points of nano cups | B．the shortcomings of nano cups |
| C．the uses of nano cups | D．the wonders of nano cups |
Which of the following does not show that nano cups are different from ordinary cups?
| A．Nano cups can’t make people healthier. |
| B．Nano cups are made of a different material. |
| C．Nano cups are much easier to be cleaned. |
| D．Nano cups are hard to produce. |
According to the text,nano cups in the market are_________.
| A．only traditional products |
| B．ordinary cups covered with a little nanometer material on the surface |
| C．cups made of a nano material |
| D．cups made of a mixed material |
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