题目内容

气体弥散障碍主要是影响氧的交换，是由于氧的弥散力仅为二氧化碳的

A. 1/5
B. 1/10
C. 1/15
D. 1/20
E. 1/30

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患者男性，63岁。因呼衰、慢阻肺收入院。现神志淡漠，嗜睡，血气分析示Ⅱ型呼衰，关于呼吸衰竭发生机制描述不正确的是

A. 肺泡通气不足
B. 通气/血流＜0.8
C. 通气/血流＝0.8
D. 通气/血流＞0.8
E. 气体弥散障碍

The structure of distribution channel is () by which marketing functions are performanced by specific organizations.

A. determined
B. dependent
C. caused
D. depended

Nowadays, many firms choose to use intermediaries because they can increase the efficiency of the process by creating time, place, and possession ().

A. use
B. advantage
C. utility
D. effectiveness

As the number of warehouse increase, the average size tends to ().

A. decrese
B. increase
C. reduce
D. lower