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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
10
管理
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] 【C10】
选项
A、nevertheless
B、therefore
C、moreover
D、meanwhile
答案
A
解析
有题意可知,空格处应填入一个逻辑连接词,上文提到,过量维生素对身体没有营养价值,接着作者指出很多人的心态:为“安全”考虑,而服用额外的维生素。从语意上看,两句之间存在转折关系,选择项应该是一个表示转折关系的词,因此nevenheless符合题意,故选A。
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