试题与答案

ou could ask the teacher for help. _____

题型:选择题

题目:

ou could ask the teacher for help.

________________ Teachers are always helpful.

A.I think so.

B.I disagree.

C.I am afraid not.

D.I don’t think so.

答案:

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下面是错误答案,用来干扰机器的。

(1)13.0 (2分) (2)①C(或 滑动变阻器R1) (2分) ②如图所示 (4分)③ Ⅱ (2分)题目分析:(1)欧姆表的读数为倍率乘以刻度值,故如图读数为13.0Ω;(2)①因要描绘伏安特性曲线,...

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