特殊医学用途配方食品的广告适用以下哪些规定？（） A.《广告法》 B.其他法律关于药

总体均数置信区间的宽度取决于（）.

A.置信水平

B.标准差

C.标准误

D.置信水平、标准差和样本含量

E.样本含量

—I went to work on foot yesterday, though it was raining cats and dogs.

—You      a bus. You were likely to get a cold.

A．must have taken

B．would take

C．should have taken

D．could take

我国重要的“西气东输”工程的起点和终点城市是[ ]

A．哈密、北京

B．轮南、上海

C．乌鲁木齐、上海

D．轮南、北京

分馏塔底为什么要设过滤多？