触电事故季节性明显因为这段时间多雨、潮湿，电气设备绝缘性能降低，操作人员常因高温而不按规定穿戴工作服。
参考答案：对
The possibility of a way out of the difficulty never _____ to the captain and his crew.
A．happened
B．occurred
C．appeared
D．flashed
客户申请容量在（）kVA及以下者，宜采用10kV电压等级供电。
A.3150
B.5000
C.8000
