甲型肝炎的潜伏期为（） A.1～5周 B.3～7周 C.2～6周 D.1～4周 E.

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问题单项选择题 A1/A2型题

甲型肝炎的潜伏期为（）

A.1～5周

B.3～7周

C.2～6周

D.1～4周

E.2～8周

答案

参考答案：C

解答题

一个数的2倍减去2.6与4的积，差是10，求这个数．

单项选择题

I knew nothing of the motives behind his recent move, and I don't know either the person to put him up to the action.

A．nor did I know... who

B．not did I know... that

C．nor do I know... that

D．either did I know... who