题目内容

单侧肺通气低氧血症发生的机制主要是( )

A. 通气侧肺V/Q<0.8
B. 非通气侧肺萎陷
C. 麻醉控制非通气侧HPV
D. 通气压力低导致氧供不足
E. 吸人氧气浓度过低

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现在我们经过和平谈判,中国和印度在陆地边境线上,已经没有一寸领土有争议了。

A. 对
B. 错

If I have another chance, I _____ to China again.

A. come
B. have come
C. came
D. will come

If I were a Chinese, I _____ the Great Wall once a year.

A. climb
B. would climb.
C. will climb
D. had climbed

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A. have not pulled
B. not pulled
C. had not pulled
D. had pulled

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