On May 12th, many parts of Sichuan were struck by an earthquake, from__________ effects the people are still suffering.

A．that

B．whose

C．those

D．what

当零速列车线无效时（速度>1km/h）操作紧急解锁装置将会引起（）。

A.门驱动单元上锁闭装置处的紧急解锁开关将发生动作

B.门驱动单元上制动装置处的紧急解锁开关将发生动作

C.“互锁回路”将被断开，向电子门机控制器EDCU发出信号

D.乘客室车门保持关闭，开门需要至少300N的操作力。