道岔轨道区段最多为()。
A、一送二受
B、一送三受
C、一送一受
D、一送四受
参考答案:B
----What should I wear for the party, darling?
---- .We're already late!
A.Come on!
B.Cheer up!
C.It's a long story.
D.Don't mention it.
痱子粉按药物性质分类属于()
A.毒性药散剂
B.内服散剂
C.单味药散剂
D.含低共熔成分散剂
E.含液体成分散剂