利率的高低首先取决于( )。
A.资金数量的大小B.社会平均利润率C.资金周转的速度D.资金的使用时间
参考答案:B
用所给词的正确形式填空。
1. This woman is _________ (Li Lei) mother.
2. The boy is _________ (cry) now.
3. Would you like some _________ (banana)?
4. I can see two _________ (woman).
5. I can see many _________ (people).
6. I'd like three _________ (bottle) of water.
7. May I have some _________ (grape)?
8. The boys and girls are _________ (child).
9. She is _________ (play) with the baby.
10. The man is _________ (read) a book.
血气分析对呼吸衰竭的诊断标准,下列哪项不正确()
A.海平面
B.吸入纯氧时
C.吸入空气时
D.PaO2<60mmHg
E.伴或不伴有PaCO2>50mmHg