In the word “down”, the underlined part

以下选项中，属于兴奋剂的有（）。

A.蛋白同化制剂

B.肽类激素

C.麻醉药品

D.精神刺激剂

E.药品类易制毒化学品

If I ______ about this computer program, a hage amount of time and energy would have been saved.

A．know

B．knew

C．had known

D．have known

______child as he is, ______he behaves like an adult.

A．A; but

B．/; /

C．/; but

D．the;/

简述泡沫破坏的机制。

患儿，出生10天。诊断为胎怯。证见形体消瘦，肌肉痿软，吮乳量少，便下稀薄，目肤黄疸。其病机是（）

A.心虚

B.肺虚

C.肝虚

D.脾虚

E.肾虚