The deep-sea listening system makes use of（    ）

试卷相关题目

• 1T he underwater listening system was originally designed（    ）

  A.to replace the global radio communications network

  B.to study the movement of ocean currents

  C.to monitor deep-sea volcanic eruptions

  D.to trace and locate enemy vessels

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• 2The passage is chiefly about（    ）

  A.the civilian use of a military detection system

  B.the exposure of a U.S.Navy top-secret weapon

  C.an effort to protect an endangered marine species

  D.a new way to look into the behavior of blue whales

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• 3I n our country, the voltage of the DC ultra-high voltage power network is（    ）

  A.DC±500kV

  B.DC±800kV and above

  C.DC±330kV

  D.DC±1000kV

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• 4What  is  the  meaning  or'uHV"、（    ）

  A.The high voltage

  B.The extra-voltage

  C.The rated standard voltage

  D.The ultra-high voltage

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• 5I n our country, the specifed rated standard voltages is（    ）

  A.the phase voltage effective value

  B.the phase voltage peak value

  C.the line voltage effective value

  D.the line voltage peak value

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• 6It can be inferred from the passage that（    ）

  A.blue whales are no longer endangered with the use of the new listening system

  B.military technology has great potential in civilian use

  C.new radio devices should be developed for tracking the endangered blue whales

  D.opinions differ as to whether civilian scientists should be allowved to use military technology

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• 7Which of the following is true about the U.S Navy underwater listening network、（    ）

  A.It has been replaced by a more advanced system

  B.It is now partly accessible to civilian scientists

  C.It became useless to the military after the Cold War

  D.It is indispensable in protecting endangered species

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• 8The sun is the source of all of the following EXCEPT（    ）

  A.gasoline

  B.natural gas

  C.atomic power

  D.animal fat

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