管道中的工质(气体或液体)流速越高,则越容易产生()。
A、静电积聚
B、温度上升
C、压力增加
参考答案:A
该病人的诊断是
A.宫颈原位癌
B.宫颈癌Ⅰa期
C.宫颈癌Ⅰb期
D.Ⅱa期
E.Ⅱb期
— Listen, there is some strange noise.This machine must be________.
— I think so.You must have it checked. [ ]
A. out of order
B. out of date
C. out of sight
D. out of control