Digestion______the necessary chemical changes in the food which must occur before it can be absorbed.

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问题 Digestion______the necessary chemical changes in the food which must occur before it can be absorbed.

选项 A、consists in
B、feeds in
C、puts in
D、consists of

答案A

解析 consist in"在于";feed in"输入(电脑数据)";put in"插入,伸进";consist of"组成"。全句意为:"消化就是食物在其被吸收之前必须发生的必要的化学变化。"
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