The ratio of the work done by the machine ________ the work done on it is called the efficiency of the machine.

试卷相关题目

• 1We have done things we ought not to have done and ________ undone things we ought to have done.

  A.leaving

  B.will leave

  C.left

  D.leave

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• 2Children are ________ to have some accidents as they grow up.

  A.obvious

  B.indispensable

  C.bound

  D.doubtless

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• 3You can’t be ________ careful in making the decision as it was such a critical case.

  A.very

  B.quite

  C.too

  D.so

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• 4The manager promised to have my complaint ________.

  A.looked through

  B.looked into

  C.looked over

  D.looked after

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• 5Understanding the cultural habits of another nation, especially ________ containing as many different subcultures as the United States, is a complex task.

  A.one

  B.the one

  C.that

  D.such

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• 6________ the flood, the ship would have reached its destination on time.

  A.In case of

  B.In spite of

  C.Because of

  D.But for

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• 7In your first days at the school you’ll be given a test to help the teachers to ________ you to a class at your level.

  A.locate

  B.assign

  C.deliver

  D.place

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• 8The story that follows ________ two famous characters of the rocky Mountain gold rush days.

  A.concerns

  B.states

  C.proclaims

  D.relates

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• 9America will never again have as a nation the spirit of adventure as it ________ before the West was settled.

  A.could

  B.was

  C.would

  D.did

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• 10People who refuse to ________ with the law will be punished.

  A.obey

  B.consent

  C.conceal

  D.comply

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