已知 E 1 =7V , E 2 =16V , E 3 =14V , R 1 =16Ω , R 2 =3Ω , R 3 =9Ω 。求: K 打开时, U ab = ? K 闭合时, I 3 = ?
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【简答题】A young man was going to spend his 56 in a village.That night he decided to sleep at a small hotel near the train 57 . Before going to bed, he said to the owner(所以者)of the hotel,“Excuse me,sir. Will...