协助判断肝实质损害严重程度的指标是（）。 A.ALT B.AST C.c-AST D

—I wonder if you could go with me to the shopping mall.

—Don’t disturb me. I ______ my experiment report all the morning and haven’t finished yet.

A．wrote

B．was writing

C．have written

D．have been writing

The desks in our classroom are so close together that there is not enough room to move       them．

A．between

B．in

C．across

D．over

佟某驾驶一辆大客车(乘载54人，核载55人)行至太原境内以45公里的时速通过一处泥泞路段时，机动车侧滑驶出路外坠入深沟，导致14人死亡、40人受伤。佟某的主要违法行为是什么

A．客车超员

B．超速行驶

C．酒后驾驶

D．疲劳驾驶

转向器可分为（）、（）和极限可逆式。

牵引变电所的断路器设置有自动重合闸。