2. 职称英语
  3. Vitamins are organic compounds necessary in small amounts in the diet for th

Vitamins are organic compounds necessary in small amounts in the diet for th

游客2025-04-03  37
问题     Vitamins are organic compounds necessary in small amounts in the diet for the normal growth and maintenance of life of animals, including man.
    They do not provide energy, 【C1】______do they construct or build any part of the body. They are needed for【C2】______foods into energy and body maintenance. There are thirteen or more of them, and if 【C3】______is missing a deficiency disease becomes【C4】______.
    Vitamins are similar because they are made of the same elements—usually carbon, hydrogen, oxygen, and【C5】______nitrogen. They are different【C6】______their elements are arranged differently, and each vitamin【C7】______one or more specific functions in the body.
    【C8】______enough vitamins is essential to life, although the body has no nutritional use for 【C9】______vitamins. Many people, 【C10】______, believe in being on the "safe side" and thus take extra vitamins. However, a well balanced diet will usually meet all the body’s vitamin needs. [br] 【C2】
选项 A、shifting
B、transferring
C、altering
D、transforming
答案 D
解析 由文意可知，空格填入的分词需和into搭配，并符合文意。transform常与into搭配，强调的是“事物大的变革或质的改变”。在此从food(食物)到energy(能量)的转变是一种质的改变，因此，D符合句意。shift不与into搭配，transfer多用于位置的改变，也不与into搭配；alter强调部分或少量的变动，程度较轻，因此以上三个词都不能表示事物质的改变。故选D。
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