问题
问答题 简答题
中性点与零点、零线有何区别?
答案
参考答案:
凡三相绕组的首端(或尾端)连接在一起的共同连接点,称电源中性点。当电源的中性点与接地装置有良好的连接时,该中性点便称为零点;而由零点引出的导线,则称为零线。
中性点与零点、零线有何区别?
参考答案:
凡三相绕组的首端(或尾端)连接在一起的共同连接点,称电源中性点。当电源的中性点与接地装置有良好的连接时,该中性点便称为零点;而由零点引出的导线,则称为零线。
Not all people like to work but everyone likes to play .All over the world men and women,boys and girls enjoy l .Since the days of long ago,adults(成年人)and children have called their friends together to spend 2 even days playing games. Sports help people to live 3 .They help to keep people healthy and feeling good.When they are playing games,people a lot 4.This is good for their health.Having 5 with their friends makes them happy. Many people enjoy sports by watching others .In small towns,crowds(人群)meet to watch the bicycle races or the soccer games.In big cities,thousands of people 7 to see an ice-skating show or a baseball game. What are your favorite sports? Is the weather 8 where you live? Then swimming is probably one of your sports.Boys and girls in China love to 9 .There are wonderful beaches and there are beautiful 70 and lakes across the country.The weather is also good for swimming.
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