妇女在妊娠期（）献血

Let us suppose that you are in____ position of____ parent. Would you allow your child to do such a thing?

A．a; a

B．a; the

C．the; a

D．the; the

合格的心理辅导老师应具备哪些素质和技能？

注射剂制备的关键步骤是

A．洗涤

B．检漏

C．灌装和封口

D．干燥

E．灭菌

黄河分为几汛？

AM－500采煤机为保证电动机和液压油的冷却水流量不应少于（）.

A.25L/min

B.20L/min

C.15L/min

D.10L/min