造成透平联锁停车的原因有（）。
A、主蒸汽压力低
B、透平轴位移高
C、控制油压力低
D、润滑油压力低
参考答案：B, C, D
—My car _____ twice this month.
—I'm sorry to hear that.[ ]
A. has been broken in
B. was broken in
C. has been broken into
D. was broken into
A．地磁的两极与地理的两极重合
B．指南针的两极一定指向地理的两极
C．地磁的南北与地理的南北大致相同
D．地磁的北极在地理的南极附近
