某同学家中电灯不亮，电冰箱等用电器也不工作，检查保险丝没有熔

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问题选择题

某同学家中电灯不亮，电冰箱等用电器也不工作，检查保险丝没有熔断，用测电笔测试所有导线接头及用电器时，测电笔氖管均发光，断定故障是（）

A．入户电源线火线某处断路；

B．入户电源线零线某处断路；

C．入户电源线某处火线与零线短接；

D．供电局停电

答案

答案：B

选择题

—It is said that the number of Chinese characters you can type on your mobile phone is the total number of Chinese characters.

—I know. That is because the character input systems are made by foreign cell phone producers.

A．much than 25 percent

B．25 percent as less as

C．25 percent less than

D．25 percent as much

问答题简答题

三山夹两盆，是新疆最突出的地形地貌特征，三山和两盆具体指的是什么？