组织机构既要有相对的稳定性，又要随组织内部和外部条件的变化，作出相应的调整，这体现了

抢救高血压危象病人，最好选用

A．胍乙啶

B．硝普钠

C．美托洛尔

D．氨氯地平

E．依那普利

Not until yesterday ( ) your payment.

A．have we received

B．had we received

C．did we receive

D．we have received

--- Who are you waiting for?    

--- ______ the man wounded in the left leg.

A．The doctor will operate on

B．The nurse to be looked after

C．The doctor to operate on

D．His brother got

禽痘主要表现为（）

A.皮肤型

B.粘膜型

C.混合型

D.眼型