The gas-oil contact or gas-water contact_____ the lower limit of producible gas.

试卷相关题目

• 1For the creatures to become oil, it was necessary that they ______ between layers of rock for an enormous length of time.

  A.been imprisoned

  B.shall be imprison

  C.should be imprison

  D.will be imprisoned

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• 2The assumption _____ human cloning rests is that all genetic cells contain exact copies of the original set o9f genetic instructions.

  A.on which

  B.on that

  C.at which

  D.which

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• 3The water ________ Manhattan has been very important to New York.

  A.surround

  B.is surrounded

  C.surrounding

  D.surrounded

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• 4Between 1890 and 1970 the monetary costs of supplying energy _____ more or less constant or declined.

  A.to stay

  B.was stayed

  C.stayed

  D.has stayed

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• 5The reward was not always given to everyone, nor _____ to those who deserved it most.

  A.it was not given

  B.was given

  C.it was not given nor

  D.was not it given

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• 6There is also an interest in sea horse, puffers and other salty types with shapes ____ and colors ____ than even the showiest of fresh-water fish.

  A.more strange…more bright

  B.stranger…. brighter

  C.stranger… more brighter

  D.more strange…brighter

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• 7_______ was a planted sapling of the American redwood tree.

  A.There is one of the gifts

  B.One of the gifts that

  C.That one of the gifts

  D.One of the gifts

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• 8An air ship _______ by energy from the sun has been suggested.

  A.powering

  B.to power

  C.is powered

  D.powered

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• 9Most scientists agree _______ was hot for at least a time.

  A.some of the moon that

  B.some of the moon it

  C.that some of the moon

  D.while some of the moon

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• 10A group of scientists demanded that the federal government ____ all the studies it has founded on cloning.

  A.reveal

  B.revealed

  C.is revealing

  D.must reveal

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