国家公职人员运用行政法规时的渎职行为，属于（） A．刑事违法I  B．民事违法  C

一个自然数（0除外）除以这个数就增加3倍．______．

— Have you heard what Mary asked me?

— Yes. She asked _____. [ ]

A. whether I have got the ticket for the 2012 Olympic Games

B. whether you had got the ticket for the 2012 Olympic Games

C. that I have got the ticket for the 2012 Olympic Games

D. had you got the ticket for the 2012 Olympic Games

夏季引起婴儿腹泻的主要病原体是______________________。

简述Sanger双脱氧链终止法的基本原理。（聚丙烯酰胺凝胶电泳模式图）

在( )上设置拦水缘石的目的是为了避免高路堤边坡被路面水冲毁。

A．路堤

B．路基

C．路肩

D．路缘