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  25
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] 【C4】
选项 A、serious
B、apparent
C、severe
D、fatal
答案 B
解析 根据上下文，这里需要填入一个准确描述疾病症状的词。serious、severe和fatal这几个词都表示程度严重，甚至危及生命。但上下文没有暗示缺乏一种维生素会导致严重的后果，因此，这三个词都不可作为被选项。apparent只是简单地描述了疾病的症状，为正确选项。故选B。
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