29．In no case_________go        the law of nature or we’ll meet endless suffering.

A．we can; by

B．can we; for

C．we can; round

D．can we, against

呼吸衰竭的心血管系统表现无下列哪项：（）

A.心率快

B.肺动脉瓣区第二心音亢进

C.过早搏动，房颤等

D.休克

E.左心负荷增加