题目<br>答案解析<br>查看更多优质解析<br>举报<br>How many times I have seen a company or organisation habitually waste good food?! Too many times!They are well-meaning people, and they'd like to give away the food instead of wasting it by putting it...<br>解析看不懂?求助智能家教解答<br>查看解答<br>相似问题
打开开关,看看是不是有电,是不是开关接零线了,要不就是地线问题,一般都是零线问题<br>先打开开关,又电笔试试有没有电电笔不亮,亮的话就是灯的问题,不亮就是开关接了零线<br>如果不亮打开开关灯又是亮的,那么就是零线和火线接反了,到开关相去换一下就好了