题干

在一次安全教育进校园活动中,下列关于家庭用电的“对”、“错”抢答比赛,应回答“对”的是(  )

A:只有高压线路才会发生触电事故

B:家里的空气开关经常“跳闸”,一定是发生了短路

C:用测电笔辨别火线时,手不能接触笔上任何金属

D:电冰箱的金属外壳必须要接地

上一题 下一题 0.0难度 选择题 更新时间:2015-03-30 03:55:16

答案(点此获取答案解析)

D

同类题3

阅读下面短文,掌握其大意,然后从各题所给出的A、B、C和D项中,故答案选出最佳选项。

    When I was a young boy, my family was very poor. I would often help do something for the neighbors to 1 a little pocket money.

    One day I 2 on the door of an elderly woman and asked 3 she needed me to clean the yard. She asked why I was not in 4 and I showed her my worn 5, which no longer kept me warm. She 6 me to work in the yard. When I finished, she looked at me and said, “I suppose you want to be 7 now.” She then 8 a jar filled with dollar bills and said, “I'm glad you've done a 9 job today but that is not something you should be doing again. I want you to 10 new clothes and get back to school. I also want you to come back to 11 me with your report card and I will 12 you when I see you have worked hard and have some good 13. Now reach out your little hands and take out as much 14 as you can.”

    I put my hands in the jar and 15 so much money that it was 16 for me to buy what I badly needed. Later, I returned several times to see the woman and she did just as she 17. She looked at my report card and gave me a handful of dollars and some delicious food every time I 18 her that I had an “A”.

    I was twelve years old when I moved from that neighborhood. I will never forget the huge 19 this wonderful lady made over my life with her 20. This is something I hope to do myself in this lifetime over and over again.