Terraforming (Earth-forming) other planets, also known as planetary engineering (行星工程), seems like a task still centuries away for mankind to accomplish. However, it is a vigorous topic that attracts both popular and scientific interest. Why should the possibility of terraforming other planets be studied when it may be centuries before we know enough to even decide if it’s a good idea?
Mankind is getting more and more hard facts about other planets. The atmosphere of Venus has been explored; robots have surveyed the surface of Mars; Mercury, Jupiter and Saturn have been studied by spacecraft. Speculations have been answered; new questions have been raised, and enough hard data is right now becoming available to allow us to make the first attempt of planetary engineering.
In the past, people with excellent ideas about terraforming have kept them to themselves, or buried them in a desk drawer because they did not realize that anyone else was interested. But now, a wide circle of people has begun to do this kind of work. For instance, NASA funded a project on transforming Mars.
There are several strong reasons which demand that the possibilities of terraforming be studied carefully. First, it’s an exciting idea of a possible future for human beings. Such thinking has a valuable role in providing options for our future directions. Secondly, the techniques of terraforming will also help contemporary technologies in weather and climate control. Thirdly, such study may assist us in detecting any possible existence of extraterrestrial intelligence (SETI, The Search for Extraterrestrial Intelligence, 地外文明搜索) and alien (异己的) civilizations on other planets.
Though the mission is far beyond our reach at the moment, we should at least keep our options open. Through debate and study on this subject, the possibility of rebuilding other planets to make them suitable homes for people may come true some day in the future..
. According to the context, what’s the meaning of the word “speculation” in paragraph 2?
| A．The act of discussing something with a group of people. |
| B．The act of studying and researching. |
| C．The act of guessing without knowing all the facts about something. |
| D．The acting of writing letters to a certain organization. |
.
Why did people keep the idea of terraforming to themselves in the past?
| A．They thought no one else would show interest in the idea. |
| B．They gradually came to find the idea crazy. |
| C．They thought the idea would never come true. |
| D．They had few resources for further study on this topic. |
.
. Which is NOT the reason to support the study of terraforming?
| A．Even if we don’t succeed in terraforming, such study may help us to better understand technologies such as climate and weather control. |
| B．Such study may explore a new direction of development for human beings. |
| C．Such study may enable us to find the lives on other planets. |
| D．As the resources on Earth are being drained, it’s very urgent to study how to migrate (迁移) to other planets。 |
.
What’s the main idea of the article?
| A．It’s highly possible that terraforming other planets will come true so we should increase investing in this program. |
| B．Even if the idea of terraforming other planets may take centuries to realize, we have many reasons to support such studies. |
| C．Terraforming other planets is the best option for human being’s future. |
| D．More and more people are taking planetary engineering as their occupation. |
Most kinds of rose plants come from Asia. But roses are also native to other areas including northwest Africa, Europe and the United States. In 1986, Congress chose the rose as America’s national flower. Technically, Congress and President Ronald Reagan declared it the “national floral emblem.” Whatever the name, the decision did not smell sweet to supporters of others popular flowers.
Some people say roses are difficult to grow. But you have a good chance of success if you start with a few suggestions from experts. You should plant your roses where they can get sunshine for about six hours on bright days. You can buy roses form a garden center or by mail order. You can buy potted roses, also known as container roses, or bare-root plants. Each kind has its fans.
Some gardeners say potted roses are easier to plant. They say the roots develop better. But Jeffrey Dinslage, an expert, pint out that bare-root roses come without soil. So they weigh less to transport.
Another expert advises getting bare-foot roses as close to planting time as you can. If they arrive before you are ready to plant them, make sure the packing material is moist. Keep the plants in a cool, dark place. The resting plants have no leaves but still need water. When growing roses, the soil should feel moist deep down. Watering should be done in the morning.
But do not water too much. People often ask Jeffrey Dinslage about unhealthy discoloration on rose leaves. He says the spots are usually caused by too much water. After heavy rains or too much watering, he advises pulling away mulch, the substance used to protect the roots, temporarily from around the roots. This will help dry the soil. From the first paragraph, we know that in the United States _______.
| A．all the people like roses | B．there are a lot of national flowers |
| C．some roses don’t smell sweet | D．there are some other popular flowers |
Why does Jeffrey Dinslage suggest planting bare-root roses?
| A．They are easier to plant. | B．Their roots develop better. |
| C．They are cheap to transport | D．Their leaves need no water |
Which of following is closest in meaning to the underlined word “moist”?
| A．Slightly wet. | B．Pretty dry. | C．Too hard. | D．Lightly soft. |
According to Jeffrey Dinslage, people should ______ to avoid the spots on the rose leaves.
| A．not water roses in the morning | B．protect the roots of roses |
| C．improve the quality of the soil | D．not water roses very much |
You may have heard some respectable elders say, “It’s not what you want in this world, but what you get.”
Psychology teaches that you do get what you want if you know what you want and want the right things.
You can make a mental blueprint of a desire as you would make a blueprint of a house, and each of us is continually making these blueprints in the general routine of everyday living. If we intend to give a dinner for friends, we plan the menu, make a shopping list, and decide which food to cook first, and such planning is essential and necessary for any type of meal to be served.
Similarly, you can make a blueprint for your could-be-job, take a sheet of paper, and write a brief account of yourself. In making a blueprint for a job, begin with yourself, for when you know exactly what you have to offer, you can intelligently plan where to sell your service.
This account of yourself is actually a description of your working life and should include education, experience and references. Such an account is valuable. It can be referred to filling out standard application blanks and it is extremely helpful in personal interviews. While talking to you, your could-be employer is deciding whether your education, your experience and other qualifications will pay him to employ you, and your abilities must be displayed on an orderly and reasonably connected manner. When you have carefully prepared a blueprint of your abilities and desires, you have something exact to sell. Then you are ready to hunt for a job.
Get all the possible information about your could-be job. Make your eyes and ears open, and use your own judgment. Spend a certain amount of time each day seeking in the employment you wish for, and keep in mind: Obtaining a job is your job now!When the elders say, “It’s not what you want in the world, but what you get”, they mean ______.
| A．you will certainly get what you want |
| B．it’s no use dreaming but be practical |
| C．you should never be satisfied with what you have |
| D．it’s essential to be ambitious |
The blueprint made before inviting a friend to dinner is used as______.
| A．a set rule for job hunters |
| B．a suggestion on how to get a good job |
| C．an example of how to plan important things ahead |
| D．a guideline for a job description |
In the passage, the author mainly intends to point out the importance of ____.
| A．writing up a detailed plan for a job interview |
| B．keeping a blueprint of what you want to do |
| C．drawing a description of your working life |
| D．seeking the employment you want |
The sun was just coming up when I headed out to work last May at 6 a.m. Not quite dark but dark enough to need my headlights. I turned onto one of the lonely rural country roads.
Maybe it was because I was listening to the radio, maybe it was because I was already thinking about some projects at work, that I didn’t spot the dark object on the road until I was too late. I ran over it and felt the back left tire pull, and then sink. I stopped and got out of the car.
No mystery here---- my back left tyre was cut like a loaf of bread. Back 50 yards was a piece of sharp iron I had run over. I had never changed a tyre. I looked up the road. Not a car in either direction. The nearest service station was miles away. I threw up my hands. Then I remembered---- my cell phone! I powered it up before realizing, I didn’t know who to call.
Wouldn’t you know it, I spotted a car coming from the opposite direction. The driver slowed as he approached. I guessed he could see I was in trouble. He stopped his car, got out and immediately saw the trouble. “Madam, would you like me to change that tyre for you?” he asked. The man couldn’t have been more friendly. I was frightened out there and he put me completely at ease. “There,” he said, after putting on the spare, “you are all set to go.”
“Good thing for me that you were driving this way,” I told him, as I climbed back into my car.
“Funny you should say that,” he said. “Just like you, I was heading to work, but my job is in the opposite direction. I made a wrong turn at some point. I don’t know what I was thinking.”The writer didn’t notice the object on the road because ______.
| A．it was rather dark then | B．she didn’t use her headlights |
| C．there was much traffic | D．she was careless when driving |
From Paragraph 4 we learn that______.
| A．the writer felt quite anxious |
| B．no one would like to help the writer |
| C．the writer was a new driver |
| D．the cell phone should be powered up |
What did the man do when he saw the writer?
| A．He stopped and laughed at her. |
| B．He walked over to frighten her. |
| C．He helped her without hesitation. |
| D．He drove away in the opposite direction. |
The end of the story tells us that the man ______.
| A．went a wrong way | B．felt the writer funny |
| C．didn’t know what he was doing | D．come specially to help the writer |
One reaction to all the concern about tropical deforestation（毁林） is a blank stare that asks the question, "Since I don't live there, what does it have to do with me?"
The answer is that your way of life, wherever you live in the world, is tied to the tropics in many ways. If you live in a house, wash your hair, eat fruits and vegetables, drink soda, or drive a car, you can be certain that you are affected by the loss of tropical forests.
Biologically, we are losing the richest regions on earth when, each minute, a piece of tropical forest, the size of ten city blocks, disappears. As many as five million species of plants, animals, and insects (40 to 50 percent of all living things) live there, and are being lost faster than they can be found and described. Their loss is immeasurable.
Take rubber for example. For many uses, only natural rubber from trees will do. Synthetics are not good enough. Today over half the world's commercial rubber is produced in Malaysia and Indonesia, while the Amazon's rubber industry produces much of the world's four million tons. And rubber is an important material in making gloves, balloons, footwear and many sporting goods. Thousands of other tropical plants are valuable for their industrial use.
Many scientists strongly believe that deforestation contributes to the greenhouse effect -- or heating of the earth from increased carbon dioxide in the atmosphere. As we destroy forests, we lose their ability to change carbon dioxide into oxygen.
Carbon dioxide levels could double within the next half-century, warming the earth by as much as 4.5 degrees. The result? A partial melt-down of polar ice caps, raising sea levels as much as 24 feet; even 15 feet could threaten anyone living within 35 miles of the coast. Unbelievable? Maybe. But scientists warn that by the time we realise the severe effects of tropical deforestation, it will be 20 years too late.
Can tropical deforestation affect our everyday lives? Now, you should have got the answer.The underlined word "synthetics" probably means_________.
| A．natural rubber | B．tropical materials |
| C．man-made material | D．commercial rubber |
According to the passage, which of the following is NOT true?
| A．The forests are losing their function in turning carbon dioxide into oxygen. |
| B．Many of our daily uses are related to the tropical forests. |
| C．Tropical plants can be used to make industrial products. |
| D．High carbon dioxide levels will make the earth warmer. |
The author's attitude towards the tropical deforestation is _________ .
| A．puzzling | B．cold | C．supporting | D．opposed |
Which of the following might be the best title for the passage?
| A．Tropical Forests | B．The Value of Tropical Forests |
| C．Tropical Forests and Our Life | D．The Greenhouse Effects |
“Choo, Choo!” Here comes the Chunnel train. Get aboard if you want to learn more about this underground transportation system. This is an unusual form of transportation, because it is a tunnel that trains travel through and not an actual form of transportation.
The Chunnel is actually the English nickname for the Channel Tunnel. In French, it is called le tunnel sous la Manche. It is a rail tunnel beneath the English Channel at the Straits of Dover. It connects Cheriton in Kent, England with Sangatte in northern France. It is the second longest rail tunnel in the world.
Did you know that the British and the French had a race whi1e they were building the Chunnel? The race was to see who could get to the middle of the tunnel first. The British won by a little bit. It took 15,000 workers over seven years to dig the tunnel. The tunnel was finished in 1994.
The completed Chunnel cost about $ 21 billion. But it all paid off, because it became very popular, very quick. Millions of people use it. Now it is getting even more popular.
There are three complete tunnels in the Chunnel. The two outside ones are the passenger trains. The small inner one is a guidance train. The guidance train is not used for transportation. Each track is exactly parallel to each other.
There are four different train systems in the Chunnel. The Eurostar is a high speed passenger service that connects London, Paris, Brussels, and Lille. The Eurotunnel shuttle is a rail ferry service. These shuttles carry cars. These are railcars that allow drivers to drive their vehicles on and off. There are also two Eurotunnel goods service trains.
Now you know more about the Chunnel. Everybody off, this is the last stop.The Channel Tunnel links ______ with _______.
| A．Dover; Kent | B．London; Paris | C．Lille; Brussels | D．Cheriton; Sangatte |
Which of the following shows the structure of the tunnels in the Chunnel?
The Eurotunnel shuttle is intended to carry _________.
| A．passengers | B．drivers and their vehicles |
| C．goods | D．staff members of the Chunnel |
The text can most probably be __________.
| A．found in a textbook | B．read in a magazine |
| C．broadcast on a train | D．heard in a railway station |
粤公网安备 44130202000953号