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

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• 1Some 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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• 2If your fingers are wounded by knife, fire or other means, the structure of skin will ________.

  A.be changed partly

  B.be replaced by a different one

  C.be the same when the wound is recovered

  D.become ugly

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• 3Scientists and experts have proved that the pattern of a human being’s finger skin ________.

  A.is similar to his mother’s

  B.is valuable to himself only

  C.is like that of others with the same type of blood

  D.is different from that of all others

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• 4What can we learn from this passage、

  A.Rolling your eyes can stop you from napping.

  B.Some people might move themselves when sleeping.

  C.College students tend to study late into night before important exams.

  D.Sleeping once over 24 hours is much better than daytime napping.

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• 5The two research teams mentioned in the text may both agree that ________.

  A.people’s sleep-wake cycle decides the length of the midday nap

  B.sufficient sleep betters people’s learning performance

  C.scientific experiments are undependable as the results are often hard to judge

  D.the differences in their findings result from different methods applied

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• 6“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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• 7The 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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• 8Compared 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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• 9It can be learned from the last two paragraphs that cloud whitening ________.

  A.helps us learn more about global warming

  B.means cutting CO2 emissions

  C.is the best way to deal with climate change

  D.can’t stop global warming basically

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• 10If 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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