大学英语大学英语大学英语三级(CET3)阅读理解与翻译

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• 41Which of the following is NOT true about spider silk、

  A.Scientists spent decades studying spider silk.

  B.Kevlar is the toughest spider silk on earth.

  C.Some spider silk fibers are much stronger than man-made materials.

  D.Spider silk is an amazing organic material.

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• 42Scientists created a hybrid material similar to spider silk after ________.

  A.studying a previously unknown property of spider silk

  B.cooperating with foreign chemists and biologists

  C.introducing new advanced equipment

  D.discovering new species of spider

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• 43Which would the breakthrough in creating a new material lead to、

  A.People’s interest in small animals.

  B.Increased awareness of environmental protection.

  C.New understanding of spider silk.

  D.Entirely new materials and technologies.

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• 44Researchers discovered that the capture silk produced by orb spiders is weird because ________.

  A.it could be stretched to many times its original length

  B.it remains taut, even when the thread contracts or compresses

  C.it is the toughest spider silk ever found

  D.it is produced by an endangered species

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• 45Why do researchers doubt that the new material will have a broad range of applications、

  A.Because there are no enough spiders to produce silk.

  B.Because it is too expensive to produce the material massively.

  C.Because the unsteady state of the material makes it hard to produce.

  D.Because the technology to produce the material is not finished yet.

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• 46Which function cannot be achieved by the new system created by MIT、

  A.It can send out short wave radio signals.

  B.It has receivers to detect reflections of radio waves.

  C.It can detect people’s real time movement.

  D.It improves people’s health level and cures diseases.

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• 47What is the distinction between the new device and the traditional one、

  A.The new device uses the short wavelength radio signals.

  B.The traditional device achieves higher accuracy.

  C.The new device monitors people’s movement through cameras.

  D.The traditional device can observe through walls.

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• 48The new technology can be applied potentially in the following fields EXCEPT ___________.

  A.health care

  B.smart houses

  C.traffic control

  D.gaming

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• 49According to Adib, the first device they invented could only ___________.

  A.observe people’s movement behind walls roughly

  B.capture people’s facial expressions precisely

  C.detect the passenger’s heart rate

  D.measure people’s breathing behind walls

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• 50Compared with RF-system, Wi-Fi has ____________.

  A.much better software and hardware

  B.higher efficiency and accuracy

  C.much more powerful signals

  D.lower costs and better performance

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