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一樓的,你的好象做錯了吧這個問題最重要的是抓住“同一電源”(我的辛勤勞動成果,希望你能認真看看,絕對正確!)R1,R2並聯時電流比為1:2因為並聯時電壓相等,根據R=U/I算出R1;R2=U/1:U/2 =2:1下麵計算P1(因為同一…
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