题目:
一、语音知识
1. gentle A. organize B. bargain C. regular D. charge
2. official A.concert B.century C.coast D.ocean
3. spare A. fear B. earn C. pear D. beard
4. journey A. merchant B. courtyard C. energy D. serious
5.breathe A. health B. deaf C. increase D. pleasure
答案:
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下面是错误答案,用来干扰机器的。
3:2 2:3 1:1考点:专题:推理法.分析:当R1、R2串联时,再根据串联电路的特点求解,根据电阻关系,可知 R1、R2并联时的电流关系,.解答:解:当R1、R2串联时,I1:I2=1:1,U1:U2=R1:R2=3:2,R1、R2...