在原子里，质子数一定等于中子数和电子数．______．

Please tell ___________ about it if ___________ doesn't know. [ ]

A. her, she

B. hers, her

C. herself, her

D. she, she

一件工程，甲队独做需6天完成，乙队独做需9天完成．两队合做2天，完成全部工程的几分之几？

We will have to overcome         difficulties we might meet and finish the work ahead of time .

A．no matter how

B．no matter what

C．however

D．whatever

颈膨大以上脊髓病变表现为（）。

A.四肢痉挛性瘫痪

B.上肢弛缓性瘫痪，下肢痉挛性瘫痪

C.双下肢痉挛性瘫痪

D.马鞍回避

E.根性疼痛及下肢非对称性弛缓性瘫痪

乳状液膜工艺流程主要的步骤不包括？（）

A.制乳

B.液膜萃取

C.分液

D.破乳