在腹部闭合性损伤空腔脏器损伤治疗中，下列哪种措施最重要A．禁

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问题单项选择题

在腹部闭合性损伤空腔脏器损伤治疗中，下列哪种措施最重要

A．禁食、胃肠减压

B．输血、预防休克

C．注射广谱抗生素

D．予止痛药减轻病人疼痛

E．给予镇静剂，保持病人安静

答案

参考答案：A

完形填空

根据句意，用所给动词的适当形式填空。

小题1:We all know that smoking ( not allow) in public places.

小题2:Boys and girls, (put) all your effort into study and you will surely get good grades in the high school entrance examination.

小题3:Yancheng is well worth (visit) because it has many tourist attractions now.

小题4:We really hope a high-speed rail (build) between Yancheng and Shanghai in the near future?

小题5:Look, can you see those balloons (rise) up in the sky.

多项选择题

核酸分离与纯化总的原则包括（）

A.保证核酸一级结构的完整性

B.保证核酸二级结构的完整性

C.尽量排除其他分子的污染

D.尽量简化分离纯化步骤

E.尽量缩短提取时间