当仪表的示度超出仪器刻度范围时，在记录的数值前加记（）或（）符号。

I don't know why she's looking at me ______ she knew me. I've never seen her before in my life. [ ]

A. as

B. although

C. even if

D. as if

寒邪凝滞所致疼痛的特点是（）

A.胀痛

B.隐痛

C.重痛

D.冷痛

E.掣痛

His suggestion（）more people to have jobs.

A.made

B.let

C.had

D.allowed

试述微囊中药物的释放机制，影响微囊中药物释放的因素有哪些

简述液体石油产品顶部试样的点样过程。