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保安考试

【2016】全真雅思阅读模拟 (22)

1、 How did people traditionally treat fossils?

2、 What suggestions do Geigl and her colleagues give on what should be done when fossilsare found?

3、 What problems may be posed if fossil bones are washed on-site? Name ONE.

4、 What characteristic do fossil bones have to make them susceptible to be contaminated with contemporary DNA when they are washed?

5、 What could be better understood when conservation treatments are improved?

6、 The passage mentioned several animal species studied by researchers. How many of them are mentioned?

7、 In their paper published in the Proceedings of the National Academy of Sciences , Geigland her colleagues have shown what conservation practices should be followed to preserveancient DNA.

  • A.TRUE
  • B.FALSE
  • C.NOT GIVEN

8、 The fossil bones that Geigl and her colleagues studied are all from the same aurochs.

  • A.TRUE
  • B.FALSE
  • C.NOT GIVEN

9、 Geneticists don’t have to work on site.

  • A.TRUE
  • B.FALSE
  • C.NOT GIVEN

10、 Only newly excavated fossil bones using new conservation methods suggested byGeigl and her colleagues contain ancient DNA.

  • A.TRUE
  • B.FALSE
  • C.NOT GIVEN

11、 Paabo is still worried about the potential problems caused by treatments of fossils intraditional way.

  • A.TRUE
  • B.FALSE
  • C.NOT GIVEN

12、 “This information” in paragraph 3 indicates:

  • A It is critical to follow proper practices in preserving ancient DNA.
  • B The best way of getting good DNA is to handle fossils with gloves.
  • C Fossil hunters should wear home-made hammers while digging up bones.
  • D Many palaeontologists know how one should do in treating fossils.

13、 The study conducted by Geigl and her colleagues suggests:

  • A the fact that ancient DNA can not be recovered from fossil bones excavated in the past.
  • B the correlation between the amount of burying time and that of the recovered DNA.
  • C the pace at which DNA degrades.
  • D the correlation between conservation practices and degradation of DNA.