這份I.S.功課後日要交了,希望各位幫我解答呢的題目,THX!! ^_^
safety in using electricity:
7. A circuit __________ works like a fuse,but if can be turned on again easily after switching 'off '.
8.Appliances which are doubly __________ should not need to be earthed.
I.S.題-electricity(急!急!) 6
2007-03-20 6:38 am
回答 (1)
收錄日期: 2021-04-12 23:38:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070319000051KK04844