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,...