确诊心搏骤停的主要依据是（）

A.血压测不到

B.神志突然丧失

C.呼吸突然停止

D.大动脉搏动消失

E.心音消失

Every modern government, liberal or otherwise, has a specific position in the field of ideas ; its stability is vulnerable to critics in proportion to their ability and persuasiveness.()

A. futile

B. susceptible

C. feasible

D. flexible