题目内容

Drinking is a ________ (principle) cause of highway deaths.

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We're going to __________ (focus on) the relationship between freedom and necessity.

A chemist can _________ (isolation) the oxygen from the hydrogen in water.

下列预防和治疗术后肺不张的措施，哪项是不恰当的？

A. 鼓励咳痰
B. 防止呕吐
C. 术前锻炼深呼吸
D. 术后胸腹部切口应紧紧固定或绑扎
E. 减少肺泡和支气管内分泌物增多，如术前2周戒烟

手术前准备的最根本目的是

A. 促进伤口愈合
B. 防止切口感染
C. 提高病人对手术的耐受力
D. 预防术中各种并发症
E. 促进术后康复