公共课考研英语英语1991年全国硕士研究生入学统一考试英语试题

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• 41A growing plant needs water for all of the following except ________.

  A.forming sugars

  B.sustaining woody stems

  C.keeping green

  D.producing carbon dioxide

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• 42The essential function of photosynthesis in terms of plant needs is ________.

  A.to form sugars

  B.to derive energy from light

  C.to preserve water

  D.to combine carbon dioxide with water

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• 43The second paragraph uses facts to develop the essential idea that ________.

  A.a plant efficiently utilizes most of the water it absorbs

  B.carbon dioxide is the essential substance needed for plant development

  C.a plant needs more water than is found in its composition

  D.the stronger the wind, the more the water vapor loss

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• 44According to the passage, which of the following statements is TRUE、

  A.The mineral elements will not be absorbed by the plant unless they are dissolved in its root.

  B.The woody stems contain more water than the leaves.

  C.Air existing around the leaf is found to be saturate

  D.D.Only part of the carbon dioxide in the plants is synthesized.

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• 45This passage is mainly about ________.

  A.the functions of carbon dioxide and water

  B.the role of water in a growing plant

  C.the process of simple sugar formation

  D.the synthesis of water with carbon dioxide

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