下列哪些情况属于腹内压力增高的原因()。
A.腹水
B.慢性便秘
C.婴儿经常啼哭
D.慢性咳嗽
E.妊娠
参考答案:A, B, C, D, E
解析:所列各项都可导致腹内压升高。
Difficult conditions will sometimes ________ a man's best qualities.
A.give out
B.bring out
C.let out
D.take out
How did it come about that you failed to ______ in time for the meeting yesterday?
A.turn down
B.turn over
C.turn off
D.turn up