题目内容

长期应用易产生生理依赖性的是

A. 间羟胺
B. 去甲肾上腺素
C. 哌替啶
D. 大仑丁(苯妥英钠)
E. 雷尼替丁

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Despite much research, there are still certain elements in the life cycle of the insect that ______ not fully understood.

A. are
B. were
C. is
D. was

处方结构中的主要部分是

A. 处方前记
B. 医生签名
C. 处方编号
D. 处方后记
E. 处方正文

Writing stories and articles ______ what she enjoys most.

A. is
B. have been
C. was
D. were

In our country each boy and each girl ______ the right to receive a good education.

A. is
B. are
C. has
D. have

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