【简答题】电路如图所示, 已知 R 1 = R 3 =2 W , R 2 =5 W , R 4 = 8 W , R 5 =14 W , E 1 = 8V , E 2 = 5V , I S = 3A ,则用戴维南定理求图示电路中的电流 I 时,戴维南等效电路的 U oc 为 _________V ,等效内阻为 __________ Ω,图中 电流 I 为 __________ A 。
【简答题】Mary is an American schoolgirl. 小题1: . She doesn’t know Chinese, but she is trying to study and speak it. 小题2: . Sometimes they don’t understand her, because she can’t speak Chinese well. It’s Saturda...
【简答题】A. He doesn' t like to work hard. B. He thinks the pay is too low. C. He doesn't want to spend too much time working. D. He thinks it' s too far away from his home.