题目内容

[音频]

A. Take some medicine.
B. Sleep early every night.
C. Have some vegetables.
D. Get an injection.

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下列哪一项不是唾液的生理作用( )

A. 湿润和溶解物
B. 清洁和保护口腔
C. 杀菌
D. 部分消化蛋白质
E. 部分消化淀粉