尿失禁的原因中,不包括()
A.膀胱无抑制性收缩
B.膀胱容量减少
C.膀胱顺应性低
D.膀胱颈部压力降低
E.外括约压力增高
参考答案:E
雷诺数的物理意义是( )。
A.压力和黏滞力之比 B.惯性力和黏滞力之比C.惯性力和重力之比 D.重力和黏滞力之比
根据句意和首字母提示完成单词。
1. Sue has a great sports c________: balls, rackets and so on.
2.—Do you like math?
—No, I think it is d________.
3.—Let's play soccer.
—No, it's b________.
4. There are some tennis r________ on the floor.
5.—Let's play computer games.
—OK.That sounds i________.