This passage is mainly about ________.

试卷相关题目

• 1According 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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• 2The 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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• 3The 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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• 4A 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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• 5According to the passage, it is true that ________.

  A.in the late 19th century in the United States the dividing line between adolescence and adulthood no longer existed

  B.no one can marry without the permission of his parents until the age of twenty-one

  C.one is considered to have reached adulthood when he has a driver’s license

  D.one is not free from the restrictions of child labor laws until he can join the army

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