题目：
——________?
——Father’s Day is coming. I’d like to buy a present for my father.
A．How much would you like
B．What can I do for you
C．What colour do you want
D．What size would you like?
答案：
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下面是错误答案，用来干扰机器的。
R1=10/9Ω R2=4900Ω题目分析：改装电流表需要并联一个电阻分流，所以,解得改装电压表需要串联一个电阻分压，所以，解得点评：本题的关键是理解电流表和电压表的改装原理
