Look closely at ,your hands-are they clean? It doesn't matter how many times you was your hands. They're still crowded with microbes, which are also called "germs" or "bacteria". Microbes are everywhere. But don't worry-most microbes don't harm you. and many actually help you stay alive.
Now, scientists say the microbes that live on our hands could be used in a surprising way: fighting crime.
When police visit the scene of a crime, they often look for fingerprints to try to identifythe criminal. But according to a recent study, investigators could even use microbes to help break a criminal case.
Every person has his or her own set of microbes that live on their hands, according to scientists at,the University of:Colorado. That means the mix of different kinds of microbes on everybody's hand is unique-much like one's fingerprint.
The scientists wanted to know whether this microbe mix could be used as a new kind of fingerprint-especially in a crime scene where fingerprints might be hard to find. And policemen use forensics such as studying fingerprints to identify the criminal.
"Microbe fingerprints are harder to hide," said Noah Fierer, one of the scientists.
"You can't sterilize(为……杀菌) a surface just by wiping it off. "
His team compared the bacteria on the hands of 273 people with the bacteria found on each person's computer keyboard. For the study, the keyboards had been used only by the people who were being tested. The study showed that the mix of microbes from each per- son's hands matched the mix of microbes on that person's keyboard. The scientists were easily able to tell the 273 people apart-just by looking at their keyboards.
But there are a lot more than 273 criminals. Other scientists wonder whetherthe microbe fingerprint can really be that useful.
Fierer agrees that scientists have a lot more work to do before the microbe fingerprint will be a useful tool．According to the passage, microbes on people's hands_____
| A．do more harm than good | B．are easy to get rid of |
| C．are almost the same | D．might help find crimes |
The underlined word "forensics" in Paragraph 5 probably refers to________.
| A．the scientific test used by police |
| B．a new kind of fingerprint |
| C．a kind of bacteria'in people's hands |
| D．a kind of newly invented keyboard |
What did Fierer's team find through the study?
| A．They found the criminal among the 237 people. |
| B．They could tell who had used which computer. |
| C．Computer keyboards couldn't keep people's microbe fingerprints. |
| D．People's characters could be identified by the keyboards they used. |
We can learn from the passage that ______.
| A．your microbes may give you away |
| B．scientists will come to a clear conclusion soon |
| C．many scientists think microbe fingerprints useless |
| D．the microbe fingerprint has been used in many cases |
The main idea of the passage is about_____.
| A．the importance of fingerprints | B．how to clean our hands |
| C．the usefulness of microbes | D．different germs on our hands |
With their weakening bodies, advanced age or increasing pressure of work or study, people have been advised and usually persuaded to have health care products. Do you remember your first time to take a nutritional supplement(营养补充品)? What was your first impression?
Posted by Amy, Dec. 23, 2010 8:05 PM
Madeline on Dec. 24, 2010 7:25 PM
Years ago, as a young mom with two small children, I struggled to keep up with the demands of a busy life. One day, I woke up feeling so tired that I knew something had to change!
A friend gave me some Royal Jelly—an amazing substance(物质)from the beehive(蜂房). I was doubtful, but desperate…so I tried it! In time, I began to experience renewed energy and vitality(活力)like never before! Now, over two decades later, I travel all round the country, sharing my life-changing experience. I’m grateful for the energy to keep up and love to share this wonderful discovery with others.
Blanca on Dec. 25, 2010 7:02 PM
Ten years ago, when I was 73, my mind wanted to be busy and useful, but my body didn’t. I became tired and lethargic(无精打采的). That’s when my daughter Madeline tried to persuade me to try her special Royal Jelly. It made such a dramatic(巨大的)difference in her life, so she was sure it could help me too! Hesitating for 2 days, I gave in. She was right! I no longer felt worn out. I had a new, youthful zest(热情)for life and I’ve been OK — thanks to Royal Jelly!
Lori on Dec. 25, 2010 10:27 PM
When my mom Madeline was introduced to Royal Jelly, it affected my life, too! Mom gave me some o
f her fantastic Royal Jelly. Boy, things did turn around! I had more energy and stamina(耐力)and was finally able to keep up with high school and, eventually, college activities. Today, I’m a busy mom in my mid-thirties with two active boys and a new business! I have enough energy to do it all! I’m glad I took my Mom’s advice. .
.From the text, we learn that ________________. .
| A．Madeline became more than willing to take Royal Jelly at the very beginning |
| B．Lori was grateful partly because Royal Jelly helped him to improve his studies |
| C．Royal Jelly is a product that can help renew a person’s energy and vitality |
| D．Amy has benefited from Royal Jelly so she posted a topic about the product |
.
Which of the following is true of Blanca?
| A．She replied to the topic on Christmas Eve. |
| B．She tried Royal Jelly without hesitation. |
| C．She is now supposed to be in her seventies. |
| D．She was the second one to reply to the topic. |
.
. What’s the relationship between the Royal Jelly takers?
| A．Lori and Blanca are Madeline’s grandchildren. |
| B．Madeline is Blanca’s daughter and Lori’s mother. |
| C．Blanca is Lori and Madeline’s great grandmother. |
| D．They have no blood relationship but friendship. |
.
Where can we most probably read this text?
| A．In a sports club. | B．On an Internet page. |
| C．In a fiction. | D．In a travel magazine. |
The Hawaiian Islands are in the Pacific Ocean almost 4,000, kilometres west of California. Tourism is very important to Hawaii. The tropical weather and beaches bring people from all over the world. But Hawaii is also experiencing problems from the downturn(经济衰退).
Last year was the first year since 2004 that Hawaii has had fewer than seven million visitors. The state had 6,800,000 arrivals in 2008. That was a decrease of 10% from the year before. State officials expect a decrease this year of another 2%. And they expect no growth in the economy through most of the year.
The Hawaiian Islands were formed millions of years ago by hot liquid rock flowing from undersea volcanoes. Visitors can still watch the process take place on the largest island, which like the state is named Hawaii. People usually just call it the Big Island.
Experts say Polynesian people first sailed to Hawaii about 2,000 years ago. A king ruled the islands when the 18th century British explorer James Cook arrived. At first, Hawaiians treated Captain Cook like a god. But in the end, he was killed on the Big Island in 1779.
Britain gave the islands their independence in 1843. Then, fifty years later, a group of American businessmen ousted the ruler and founded the Republic of Hawaii. It became an American territory in 1900.
That was three years after the United States set up a naval base at Pearl Harbor, on the island of Oahu, which served as the command base for American operations in the Pacific during World War Two.
After the war, most Hawaiians required that Hawaii should be an independent state. In Congress(国会), though, there was resistance 
from southern states because of Hawaii’s non-white native population. But Congress passed the Hawaii Statehood Bill in 1959. Hawaiians accepted it, and on August 21st, President Eisen
hower declared Hawaii the fiftieth state..The number of visitors to Hawaii in 2009 is expected to be about _________.
| A．5,984,000 | B．6,664,000 | C．6,800,000 | D．6,936,000 |
.When did the US set up a naval base at Pearl Harbor?
| A．In 1893. | B．In 1897. | C．In 1900. | D．In 1959. |
.What does the underlined word “ousted” in Paragraph 5 mean?
| A．Forced out. | B．Picked out. | C．Elected. | D．Became. |
.Which of the following is the correct order in the history of Hawaii?
a. It was ruled by a Polynesian king. b. It became an American territory.
c. The Republic of Hawaii was founded. d. It was under the rule of the British.
e. It became independent in 1843. f. It joined the United States.
| A．a, b, d, c, e, f | B．a, e, d, c, b, f | C．a, d, e, c, b, f | D．a, e, e, d, b, f |
Once upon a time two brothers who lived on neighbouring farms fell into conflict. It was the first serious one in 40 years of farming side by side, sharing machinery, and trading labor and goods as needed .
Then the long cooperoration fell apart. It began with a small misunderstanding and it grew into a major difference, and finally it exploded into an exchange of bitter words followed by weeks of silence.
One morning there was a knock on John's door. He opened it to
find a man with a carpenter's toolbox. "I'm looking for a few days’ work" he said. "Perhaps you would have a few small jobs here and there I could help with. Could I help you?"
"Yes," said the older brother. "I do have a job for you. Look across the creek(河沟) at that farm. That's my neighbor, in fact, it's my younger brother. Last week there was a meadow（草地） between us and he took his bulldozer（推土机） to the river levee（堤） and now there is a creek between us. Well, he may have done this to spite me, but I'll go him one better. I want you to build me a fence — an 8-foot fence — so I won't need to see his place or his face any more. Cool him down , anyhow."
The carpenter said, "I think I understand the situation. I'll be able to do a job that pleases you."
The older brother had to go to town, so he helped the carpenter get the materials ready and then he was off for the day. The carpenter worked hard all that day measuring, sawing, nailing, and hammering.
About sunset when the farmer returned, the carpenter had just finished his job. The farmer's eyes opened wide, his jaw dropped.
There was no fence there at all. It was a bridge — a bridge stretching from one side of the creek to the other! A fine piece of work — and his younger brother, was coming across, his hand spread out ..
"You are quite a fellow to build this bridge after all I've said and done."
The two brothers stood at each end of the bridge, and then they met in the middle, taking each other's hand. They turned to see the carpenter lift his toolbox on his shoulder. "No, wait! Stay a few days. I've a lot of other projects for you," said the older brother.
"I'd love to stay on," the carpenter said, "but, I have many more bridges to build.". What was the life for the two brothers before the conflict ?
| A．They live a poor , miserable life . |
| B．They were friendly neighbours ,helping each other . |
| C．They never speak to each other . |
| D．They live together as one family. |
. The underlined word “spite” in paragraph 4 probably means ______________.
| A．try to please | B．make angry on purpose |
| C．laught at | D．look down upon |
..Which of the following is NOT true according to the passage ?
| A．The younger brother used his bulldozer to dig a creek . |
| B．After the conflict John was angry with his younger brother. |
| C．At first the carpenter planned to build an 8-foot fence as John asked him to. |
| D．The two brothers made peace at last . |
. The best title for this passage is _______________.
| A．A Fine Piece of Work | B．A Clever Carpenter |
| C．A Conflict between Two Brothers | D．Two Brothers |
Satellites are an important part of our ordinary lives．For example, the information for weather forecasts is sent by satellite．Some satellites have cameras which take photographs of the Earth to show how clouds are moving．Satellites are also used to connect our international phone calls．
Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programs come to US through satellites．Airplane pilots also sometimes use a satellite to help them find their exact location．
We use satellites to send television pictures from one part of the world to another．They are usually 35，880 kilometers above the equator．Sometimes we can see a satellite in the sky and it seems to stay in the same place．This is because it is moving around the world at 11，000 kilometers an hour—exactly the same speed
that the earth rotates．A satellite must orbit the Earth with its antennae(天线)facing the earth．Sometimes, it moves away from its orbit，So there are little rockets on it which are used to put the satellite back in the right position．This usually happens about every five or six days．
Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth．A satellite usually works for about 10-12 years．Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired．Often，very old or broken satellites are left in space to orbit the Earth for a very long time．This is very serious because some satellites use nuclear power and
they can crash into each other．Which of the following is NOT done by satellites according to the passage?
| A．Sending information for weather forecast． |
| B．Taking photographs of the Earth． |
| C．Sending TV pictures． |
| D．Providing food for airplane pilots． |
What’s the speed the earth rotates at?
| A．35,880 kilometers per hour． | B．335,880 kilometers per hour． |
| C．11,000 kilometers per hour． | D．110,000 kilometers per hour |
Why does the satellite move around the world at the same speed as the Earth rotates?
| A．In order to take photographs． |
| B．In order to stay in a certain position in the orbit． |
| C．In order to move away from its orbit． |
D．In order to send television pictu res． |
What does the underlined word “This” in the 3rd paragraph refer to?
| A．A satellite． | B．A little rocket． |
| C．A satellite seems to stay in the same place in the sky． | |
| D．The satellite puts the rockets in the right position． |
Which is true of satellites?
| A．A satellite usually works for about 10-12 years． |
| B．Every time a satellite gets broken，it is brought back to the Earth to be repaired． |
| C．A broken satellite is never left in space． |
| D．They often crash into each other． |
Some people love eating food right after it is cooked. I prefer food just take out from the freezer. Fruit, candy, nuts, chocolate, cake with butter cream frosting(糖霜),even peas, all of them taste delicious when frozen. In fact, I often eat them that way.
I was a kid when I picked up the habit. In my family, lots of things were thrown into the freezer —finally, two freezers—to prevent them from going bad. Among them were some of the candies my sisters and I had collected on Halloween.
If we eat when they are still warm, we’ll find ourselves taking the cookies more than we should. It’s better if we can put them into the freezer and wait. That way we’ll eat less and enjoy them more because they are hard and chewing becomes a slower, more patient effort. That’s the point about frozen butter-cream frosting. Put it in your mouth at room temperature, and it’s gone very quickly. But when it’s frozen, you can enjoy the taste much longer as it melts(融化) in your mouth.
The freezer treats a lot of fruits kindly. Take frozen grapes for example, I keep a bowl of grapes in my freezer. They become a little icy, and somehow their sweetness is improved. They are perfect and healthy dessert(点心).This is the same with oranges, apples, bananas…You might think bananas would get super-hard when frozen. Wrong! They become cool, creamy and sweet. If you have wisely covered some or all of the bananas with melted chocolate before putting them into the freezer, they will have a double taste.
As long as you aren’t eating anything that truly has to be hot, go ahead and experiment. What is the passage intended to tell us ____________.
| A．Fruit should be frozen before one eats it. | B．Frozen food is better than hot food. |
| C．The author prefers frozen food. | D．Hot food is not healthy. |
The author began to enjoy frozen food when he _________.
| A．was young | B．learned cooking | C．got married | D．got a fever |
Why does the author NOT advise us to take hot cookies?
| A．Because they need more time to prepare. |
| B．Because the taste is not good when they are hot. |
| C．Because they are too delicious to avoid our overeating. |
| D．Because we may eat them quickly and enjoy them less. |
What does the underlined word “it” in the third paragraph refer to?
| A．The taste | B．Butter cream | C．The cookie | D．Frozen butter cream frosting |
Which of the following is the advice the author gives on eating fruit?
| A．Make bananas hard. | B．Keep grapes in a bowl. |
| C．Mix kinds of fruits together. | D．Add melted chocolate to bananas. |
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