直流接地的危害？
参考答案：
直流一点接地时允许继续运行，但应尽快排除接地故障，避免发生两点接地时，引起保护误动拒动或直流系统短路。
根据所给单词的首字母提示写出单词，使句意完整。
1. It’s good for you to eat some b______ before breakfast.
2. This is the d______. We often have it at the end of dinner.
3. You’re so fat. You should eat more f______ and less meat.
4. I like to eat h______ in the fast food shop.
5. We all like to eat c______ legs.
作为教师，不一定要有明确的教育目的，但必须要有明确的教学目标。
