I n our country, what voltage dass's power network is called the highvoltage             networks、()

试卷相关题目

• 1The function of transmission is to send（    ）

  A.the electric power

  B.the heat energy

  C.kinetic energy

  D.potential energy

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• 2If you cross the ocean going east, you set you ciock（    ）

  A.ahead one hour in each new time zone

  B.ahead one time for the whole trip

  C.back one full day for each one full day

  D.ahead by twenty-three hours

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• 3The international date line is the name for（    ）

  A.the beginning of any new time zone

  B.the point where time changes by one hour

  C.the point where a new day begins

  D.any time zone in the Pacific Ocean

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• 4From   this   selection   it   seems   true   that   the   Atlantic   Ocean（    ）

  A.is in one time zone

  B.is divided into twenty four time zones

  C.is divided into five time zones

  D.cannot be crossed in five days

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• 5The difference in time between zones is（    ）

  A.seven days

  B.twenty- four hours

  C.one hour

  D.more than seven days

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• 6I 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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• 7What  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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• 8I 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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• 9The 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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• 10T 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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