什么叫带电作业？
参考答案：
带电作业是在电器设备或线路带电运行情况下，所进行的检修或试验工作
用some/any填空。
1. There are _____ books on the desks.
2. —Are there _____ students on the playground?
—No, there aren't.
3. There isn't _____ water in the bottle.
4. —Can I ask you _____ questions, Lucy?
—Of course.
椭圆齿轮流量计的壳体装有一对相互接触的圆形齿轮。
