It can be learned from the last two paragraphs that cloud whitening ________.

试卷相关题目

• 1Compared to other projects, cloud whitening ________.

  A.has a greater effect on volcanoes

  B.will bring more benefits

  C.will benefit man’s health most

  D.can reduce temperatures in a better way

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• 2The fourth paragraph mainly tells us ________.

  A.ways to deal with climate change

  B.the costs to deal with climate change

  C.cloud whitening costs much less than other projects

  D.leading nations waste much money in cutting CO2 emissions

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• 3“Marine cloud whitening” has an effect on global warming by ________.

  A.cutting sunlight

  B.sending cold air into space

  C.cooling water in the air

  D.cooling air with water

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• 4Finger-prints have often been used as a method of solving criminal cases because it ________.

  A.is complicated but reliable

  B.is simple and not expensive

  C.is expensive but easy to do

  D.can bring a lot of money

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• 5Some criminals remove their own finger-prints by ________.

  A.using printer’s ink

  B.injuring the inner skin

  C.damaging the outer skin

  D.damaging the colour

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• 6If sleep mode goes wrong，what will probably happen to your computer、

  A.It will consume as little energy as possible.

  B.It is more likely to be damaged by a virus picked up from the Internet.

  C.It will have to be rebooted when used again.

  D.It has to be shut down and unplugged.

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• 7Which of the following is NOT mentioned in the text that contributes to the different amount of energy a computer consumes、

  A.Whether it is a laptop or a desktop computer.

  B.What kind of work the computer is dealing with.

  C.The choice of how you use your computer.

  D.Whether the operating systems are new.

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• 8When does a computer consume the most energy、

  A.When we let it remain idle.

  B.When we use it to do complex calculations.

  C.When we use it to type some documents and e-mail.

  D.When we use it for surfing the Internet.

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• 9The reason why a desktop computer uses more energy than a laptop computer is that________.

  A.a desktop computer’s monitor is separate and often larger

  B.a desktop computer is larger than a laptop computer in size

  C.a desktop computer performs more kinds of work than a laptop computer

  D.a desktop computer is not energy-efficient

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• 10Which of the following is implied in the first two paragraphs、

  A.Frequent starting and stopping can damage a computer.

  B.A computer’s longevity depends more on the proper way you use it.

  C.A virus picked up from the Internet is likely to damage a computer.

  D.The more often you use a computer，the more smoothly it works.

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