下列原理中不能用于速度测量的是( )。 A．散热率法 B．动压法 C．霍尔效应

涂料在被装饰表面能形成牢固附着的连续薄膜而达到（）目的.

A.喷涂

B.成膜

C.油漆

D.保护

细菌与所致疾病组合不正确的为（）

A.幽门螺杆菌—B型胃炎

B.铜绿假单胞菌—烧伤感染

C.军团菌—军团菌病

D.百日咳杆菌—百日咳

E.流感杆菌—流感

患者，女，24岁，已婚。产后4周恶露过期不止，量多、色淡红、质稀，小腹空坠，面色白，舌淡，脉缓弱。治疗应首选（）。

A．归脾汤

B．补中益气汤

C．圣愈汤

D．人参养营汤

E．参附汤

往复式压缩机的工作原理是怎样的？

A certain clock marks every hour by striking a number of times equal to the hour and the time required for a stroke is exactly equal to the time interval between strokes. At 6:00 the time lapse between the beginning of the first stroke and the end of the last stroke is 22 seconds. At 12:00, how many seconds elapse between the beginning of the first stroke and the end of the last stroke ？（）

A.72

B.50

C.48

D.46

E.44