消除应力钢丝按外形分类，可划分为（）。

A．人字纹钢丝

B．光面钢丝

C．刻痕钢丝

D．螺旋类钢丝

E．冷拉钢丝

The worried general was looking at the map when the idea of the enemy's attack might be

launched ______dawn ______ his mind.    [ ]

A. at; crossed  

B. at; to cross  

C. before; came across  

D. after; went over