carbon nanotubes are currently the most popular topic in material science.

试卷相关题目

• 1the mit team had tried different materials before they studied natural silk in their research.

  A.right

  B.wrong

  C.not mentioned

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• 2if the hydrogen bonds break due to external forces, they break fast.

  A.right

  B.wrong

  C.not mentioned

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• 3biologist and engineer are interested in understanding natural silks because they are very light and brittle.

  A.right

  B.wrong

  C.not mentioned

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• 4silk’s strength comes from its weak hydrogen bonds working together.

  A.right

  B.wrong

  C.not mentioned

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• 5mit researchers carry out the study to illustrate an ancient chinese proverb.

  A.right

  B.wrong

  C.not mentioned

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• 6it is indicated that materials stronger than natural silk can be expected in the future.

  A.right

  B.wrong

  C.not mentioned

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• 7why did the wild life experts visit the kalahari desert、

  A.to find where honey badgers live.

  B.to catch some honey badgers for food.

  C.to observe how honey badgers behae.

  D.C.to observe how honey badgers beha

  E.D.to find out why honey badgers have a bad reputation.

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• 8what does kitso khama say about honey badgers、

  A.they are always looking for food.

  B.they do not enjoy human company.

  C.they show interest in things they are not familiar with.

  D.B.they do not enjoy human company.C.they show interest in things they are not familiar with.D.it is common for them to attack peopl

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• 9what did the team find out about honey badgers、

  A.there were some creatures they did not eat.

  B.they were afraid of poisonous creatures.

  C.female badgers did not mix with male badgers.

  D.they may get some of the water they needed from fruit.

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• 10which of the following is a typical feature of male badgers、

  A.they don’t run very quickly.

  B.they defend their territory from other badgers.

  C.they hunt over a very large area.

  D.they are more aggressive than females.

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