Every chemical change either results from energy being used to produce the change, or causes energy to be ________ in some form.

试卷相关题目

• 1In this factory the machines are not regulated ________ but are jointly controlled by a central computer system.

  A.independently

  B.individually

  C.irrespectively

  D.irregularly

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• 2Nobody yet knows how long and how seriously the shakiness in the financial system will ________ down the economy.

  A.put

  B.settle

  C.drag

  D.knock

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• 3My students found the book ________: it provided them with an abundance of information on the subject.

  A.enlightening

  B.confusing

  C.distracting

  D.amusing

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• 4He has failed me so many times that I no longer place any ________ on what he promises.

  A.faith

  B.belief

  C.credit

  D.reliance

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• 5The wealth of a country should be measured ________ the health and happiness of its people as well as the material goods it can produce.

  A.in line with

  B.in terms of

  C.in regard with

  D.by means of

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• 6If businessmen are taxed too much, they will no longer be motivated to work hard, with the result that incomes from taxation might actually ________.

  A.shrink

  B.delay

  C.disperse

  D.sink

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• 7American companies are evolving from mass-production manufacturing to ________ enterprises.

  A.moveable

  B.changing

  C.flexible

  D.varying

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• 8If you know what the trouble is, why don’t you help them to ________ the situation、

  A.simplify

  B.modify

  C.verify

  D.rectify

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• 9I can’t ________ what has happened to the vegetables, for they were freshly picked this morning.

  A.figure out

  B.draw out

  C.look out

  D.work out

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• 10I tried very hard to persuade him to join our group but I met with a flat ________.

  A.disapproval

  B.rejection

  C.refusal

  D.decline

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