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  3. Vitamins do not provide energy, nor do they construct or build any part of the body. They are needed for ______ foods into energ

Vitamins do not provide energy, nor do they construct or build any part of the body. They are needed for ______ foods into energ

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问题 Vitamins do not provide energy, nor do they construct or build any part of the body. They are needed for ______ foods into energy and body maintenance.
选项 A、transforming
B、transferring
C、altering
D、shifting
答案A
解析 本题考查动词辨析。transform“(生物、化学、数学、电力学等方面)转变，转化，使改变性质”；transfer“转移，转换(车船等)”；alter“改变”；shift“变动(位置或地方)”。把食物在体内转化成能量属于生物学方面的转化，所以选A。句意为：维他命不能生成能量，也不能组成或构造身体的任一部分。人们需要它将食物转化成能量和体内养分。
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