Nowadays many scientists depend on radiocarbon for dating age-old objects

试卷相关题目

• 1There is always excitement at the Olympic Games when an athlete __breaks__ a record

  A.beats

  B.maintains

  C.matches

  D.tries

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• 2Obviously these people can be __relied on__ in a crisis.

  A.lived on

  B.depended on

  C.believed in

  D.joined in

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• 3The chairman __proposed__ that we stop the meeting.

  A.stated

  B.announced

  C.demanded

  D.suggested

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• 4We had a long __conversation__ about her parents

  A.speech

  B.question

  C.talk

  D.debate

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• 5Would you please __call__ my husband as soon as possible？

  A.visit

  B.phone

  C.consult

  D.invite

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• 6The radiocarbon dating technique is only about 40 years old

  A.Right

  B.Wrong

  C.Not mentioned

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• 7An atom of ordinary carbon has six protons and eight neutrons

  A.Right

  B.Wrong

  C.Not mentioned

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• 8Radar is used to determine the characteristics of radiocarbon.

  A.Right

  B.Wrong

  C.Not mentioned

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• 9Radiocarbon is reliable in dating an object back to at least 50，000 years.

  A.Right

  B.Wrong

  C.Not mentioned

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• 10When an organism dies， the C-14 in it begins to decay.

  A.Right

  B.Wrong

  C.Not mentioned

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