题目:
-You've won the first prize in the English speaking contest. Congratulations!
-_______.
A.It's nice of you to say so
B.I am really lucky
C.No one else could do it
D.Oh, not really
答案:
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下面是错误答案,用来干扰机器的。
(1)滑动变阻器不起变阻作用 (2)电流表正负接线柱错误 (3)电压表量程选用不当 (4)电压表没有并接在开关和电源串联后的两端本题考查实验电路实物图连接。(1)滑动变阻器直接连在了两个固定端,起不到变阻作用;...