下列哪种脉搏提示主动脉瓣关闭不全()。
A.交替脉
B.奇脉
C.水冲脉
D.短绌脉
E.脱落脉
参考答案:C
一Is that Mr Brown?
一No, it _____ Mr Brown. He went to London this morning. [ ]
A. mustn't be
B. can't be
C. may not be
D. shouldn't be
以蒸汽为动力,把凝结水加压送回锅炉或作他用的设备为( )。
A.滑片泵 B.疏水加压器 C.射水泵 D.疏水泵