Earth has an atmosphere, which protects the surface from harmful rays.

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• Sulfur has occasionally been found in the earth in an almost pure state.

  A . regularly B . accidentally C . sometimes D . successfully

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• As observed from the Earth，the angle between lines from the Earth to the Sun and the Earth to an inferior planet is known as（）.

  A . elongation B . conjunction C . opposition D . quadrature

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• The Earth has the shape of a(n) （）.

  A . sphere B . oblate spheroid C . spheroid of revolution D . oblate eggoid

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• Generally speaking，you should expect to find low atmospheric pressure prevailing in the earth’s（）.

  A . equatorial area B . polar regions C . mid-latitudes D . All of the above

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• An uncontrolled flow of gas，oil，or other well fluids into the atmosphere is called a（）.

  A . Flow B . Breakout C . Kick D . Blowout

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• Lines drawn through points on the Earth having the same atmospheric pressure are known as （）.

  A . Isothermal B . Millibars C . Isobars D . Seismic

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• Lines drawn through points on the earth having the same atmospheric pressure are known as（）.

  A . isothermal B . millibars C . isobars D . seismic

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• Which of the following has NO effect on controlling the access permissions needed to run the "date" command on the remote machine "Earth" using the following syntax？rsh Earth date（）。

  A . The local file： /etc/.netrc B . The remote file： ~/ .rhosts C . The securetcpip command D . The remote file： /etc/hosts.equiv

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• Heaven has its seasons, Earth has its resources, man has his culture.

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• Preventing the atmosphere—stopping ozone depletion and the greenhouse effect—is an environmental necessity.

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• There were hasty discussions in an atmosphere of ________ tension and panic.

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• The tortoise as far as I know has been on earth for thousands of years.

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• 14. M: Margaret has become an intern at the White House.W: When it comes to pursuing professional goals, she likes to shoot for the stars.Q: What can be inferred from the conversation?

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• Does everyone on earth have an equal right ________ an equal share of its resources？

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• Just as the soil is a part of the earth.______the atmosphere.

  A．as it is B．the same is C．so is D．and equally is

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• It can be inferred from the passage that the gases of the Earth's atmosphere are contained by ______.

  A．a closed surface B．the gravity of the planet C．the field of space D．its critical point

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• 听力原文：W：Well, the atmosphere was nice, but the meat was tough, the potatoes were cold, and the service was terrible

  M：Yes, they also overcharged us. Q：Where have they been to？ (15) A．At a restaurant. B．At a grocery store. C．At a friend's house. D．At a supermarket.

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• It has been estimated that the earth’s surface temperature has increased ________ one quarter to three quarters of a degree since 1805.

  A) to B) be C) at D) with

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• ___in an atmosphere of simple living was what his mother wished for。

  A. The boy’s being educated B. The boy being educated C. The boy was educated D. The boy who was educated

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• It has been estimated that the earth's surface temperature has increased ______ one quarter to three fourths of a degree since 1850.

  A．by B．at C．to D．with

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• Time has（)the long history, free academic atmosphere and energetic students’ life of the university.

  A、met B、heard C、witnessed (见证)

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• 听力原文：W：I need a cart his weekend, but mine has broken down in an accident when I drove to work yesterday morning.

  M：I'm sorry to hear that, but you can always rent one if you have a license. Q：What does the man mean？ (14) A．She can use his car. B．She can borrow someone else's car. C．She must get her car fixed. D．She can't borrow his car.

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• Scientists have long believed one way to stop the Earth’s atmosphere from warming is by planting more trees. The idea is that more trees will take in or absorb some of the carbon dioxide in the atmosphere. Carbon dioxide is a gas released by cars, factories and other human activities. The gas traps heat in the Earth’s atmosphere, which warms the planet. However, two new studies have found that trees may not be as helpful in reducing carbon dioxide as had been thought.

  The first study was done at Duke University in Durham, North Carolina. Researchers pumped extra carbon dioxide into a test area where pine trees were growing. The trees grew thirty-four percent faster during the first three years. However, in time, the trees slowed to about their normal growth rate. The scientists say this is because trees need other nutrients, such as nitrogen. In the second study, researchers from Duke and Bowdoin College in Brunswick, Maine examined the soil around trees. They discovered that as the leaves broke down into the soil, all the carbon was not trapped in the soil. Much of it was released into the atmosphere as carbon dioxide. The findings of the two studies were published last month in Nature magazine. They suggest there is limited value in planting trees to reduce the carbon dioxide pollution in the atmosphere. Forest planting has been a part of negotiations on a world agreement to reduce greenhouse gases that scientists believe cause global warming. The United States, Canada, Japan and some other industrial countries have supported the idea. But this new research suggests the idea is not as effective as environmental activists had thought. Scientist Ram Oren of Duke University led the study on tree growth. He says that earlier estimates on the ability of forests to absorb carbon dioxide were overly hopeful. Some scientists not involved in the studies say the research provides some of the first evidence on how trees react to carbon dioxide. Other scientists say the research disputes a belief among some coal and power companies. The companies say that rising levels of carbon dioxide in the atmosphere will not create harmful global warming. Instead, they say it will increase forests and other plants. What is the purpose of this passage？ A．Introduce some new ideas about the relationship between trees and carbon dioxide. B．Introduce recent condition of global industrial pollution. C．Call on people to plant more trees to reduce greenhouse gases. D．Point out that power companies should be responsible for the rising levels of carbon dioxide.

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