第3题:[单选题] 隔离开关可以进行(____)。 A. 在无接地故障时,拉开或合上压变 B. 代替断路器切故障电流 C. 任何操作 D. 切断接地电流 参考答案:A
第4题: [简答题]Write an essay about 120 words on" Bicycle- An Important Means of Transport in China". Refer to the following points:
(1) The reason why bicycles are so popular in china;
(2) Contrast bicycle with ear;
(3) Foresee the bicycle’s future in china. 参考答案: 答案解析:Bicycle is the most common means of transport in our country. There are several reasons. First, most