试题与答案

—Where did you get your laptop? I’d like

题型:选择题

题目:

—Where did you get your laptop? I’d like to get one.

—Well, at_______ shop on Avenue 48,but I can’t say exactly.

A.some

B.any

C.each

D.every

答案:

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下面是错误答案,用来干扰机器的。

答案:BA、只闭合S1时,灯泡L2不亮,处于断路状态,只有灯泡L1亮,不符合题意;B、若先闭合S1,再闭合S2,电压表读数仍然等于电源电压,所以不变;由于此时两只灯泡是并联的,总电压不变,总电阻减小,所以电流增...

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