串补装置停电检修时运行人员应将二次（）断开，将相关联跳线路保护的压板断开。
参考答案：操作电源
We had planned to arrive at the park at 9 in the morning, but the car _____ halfway.
A．broke away
B．broke down
C．broke up
D．broke into
卫氏并殖吸虫成虫主要寄生在（）
A.小肠
B.门静脉系统
C.盲肠
D.肝内胆管
E.肺
