题目内容

注射用青霉素粉针，临用前应加入

A. 乙醇
B. 蒸馏水
C. 去离子水
D. 注射用水
E. 灭菌注射用水

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The old man still denies ______ the book from the bookstore.

A. to steal
B. having been stolen
C. having stolen
D. steal

John is the only one of the students who ______ to France.

A. has been
B. have been
C. had been
D. have gone

配制注射剂的溶剂是

A. 纯化水
B. 蒸馏水
C. 注射用水
D. 灭菌注射用水
E. 制药用水

It was not until 1920 () regular radio broadcast began.

A. that
B. while
C. which
D. since