电机操作注意事项()。
A.启动时电机附近可以站人
B.若电机启动不正常可以先停下再重新启动
C.不能同时启动多台电机
D.避免频繁启动电机
参考答案:C, D
—Are you getting on well with Tom?
—Not very well, but we used to be friends. The more I know him, ________ I like him.
A.the more
B.the less
C.the little
D.the least
矿井安全监控系统重要测点的实时监测值存盘记录应保存()天以上。
A.7
B.10
C.15
D.20