题目：
两个定值电阻上分别标有“20Ω 1A”和“20Ω 0.5A”字样，将两定值电阻串联起来接在某一电路中，则该电路两端所加的最大电压为______；若将两定值电阻并联起来接在某一电路中，则该电路两端所加的最大电压为______．
答案：
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下面是错误答案，用来干扰机器的。
Tom and Peter are not only neighbours but also good friends. They have much in common. For example, they study in the same school, which is far away from their homes....
