All the people were shocked by what the little girl     when she was cheated and sold to the mountain village.

A．went over

B．went through

C．got along with

D．got away

如图所示，有一电子（电量为e）经电压U₀加速后，进入两块间距为d、电压为U的平行金属板间，

若电子从两板正中间垂直电场方向射入，且正好能穿过电场，求：

（1）电子进入偏转电场时的速度；（2）金属板AB的长度．