As a defense against air-pollution damage, many plants and animals_________ a substance to absorb harmful chemicals.

试卷相关题目

• 1As a matter of rule, the scrap value of a vessel can hardly be at ________ with the sound value.

  A.par

  B.bearish

  C.collapse

  D.rally

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• 2As a salesman, he works on a (an) ________ basis, taking 10% of everything he sells.

  A.income

  B.commission

  C.salary

  D.pension

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• 3As all of us know, color-blind people often find it difficult to ________ between blue and green.

  A.separate

  B.distinguish

  C.compare

  D.contrast

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• 4As everyone knows, the exchange ________ fluctuates almost daily.

  A.ration

  B.ratio

  C.rate

  D.interest

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• 5As far as the rank of position is concerned, an associate professor is ________to a professor, though they are almost equally knowledgeable.

  A.attached

  B.subsidiary

  C.previous

  D.inferior

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