题目内容

干燥能使细菌的物质变性,此物质是

A. 多糖
B. 脂质
C. 蛋白质
D. 单糖
E. 核酸

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New ideas have been put into practice ______ he was elected our leader.

A. for
B. after
C. since
D. hence

Miranda lost weight ______ being on a diet.

A. by
B. with
C. to
D. from

条件致病菌的感染是

A. 外源性感染为主
B. 原为正常菌群,特定条件而感染
C. 与细菌寄生部位无关
D. 与机体免疫力无关
E. 易感人群为婴幼儿

I will get an exam tomorrow, so for ________ reasons I won't go out tonight.

A. direct
B. plain
C. unknown
D. obscure

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