If you don’t know that _____ failure is the mother of success, you are sure to be _____ failure in life.

A．/; /

B．a; a

C．a ; /

D．/; a

心包填塞时不出现（）

A.心音低钝

B.声音嘶哑

C.奇脉

D.双肺满布干湿啰音