填空。

1. Fish is healthy food_____  candy isn't healthy food.

2. He is from China _____ he is Chinese.

3. Is he a doctor _____ a teacher?

4. He does sports every morning, _____ he is in good health.

5. 我的眼镜在课桌上。

    My_____ _____ on the desk.

在带电设备附近测量绝缘电阻时，测量人员和兆欧表安放位置，应选择适当，保持安全距离，以免兆欧表引线或引线支持物触碰带电部分。移动引线时，应注意监护，防止工作人员触电。