-
最佳答案:Good everning everyone:I'm glad to stand here to give you a speech.And the topic
-
最佳答案:解题思路:(1)雷电容易击中地面上尖端的突起物;(2)对于金属外壳的家用电器,金属外壳一定接地,防止外壳漏电,发生触电事故;(3)发现有人触电或电引起的火灾以及
-
最佳答案:A meaningful ActivityOur school has now started an activity called “Build Civili
-
最佳答案:翻译成英语吗?My school, to create a harmonious campus, my school has changed a lot. Th
-
最佳答案:A、使用三脚插头和三孔插座,可以把用电器金属外壳与大地相连,如果用在两线插头的插排,去掉一个脚,一旦漏电,人碰到用电器外壳,会触电,故A错;B、雷容易击中地面上