.With an electronic typewriter ,we can get evenly typed characters regardless of the pressure ________we strike the keys.

A．that

B．with which

C．that

D．by that

既有线有列车通过时，靠近既有线的施工运输车辆都应（），保持静止状态，待列车通过后恢复作业，严禁有列车通过时，紧靠既有线及既有路基平行等高的施工地段，运输车辆仍从事行驶和转头作业

A.继续施工

B.专人防护

C.停止作业