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【简答题】
在图3-15所示电路中，u s (t)=5costV，R=5Ω，L 1 =1H，|M|=0.1H，L 2 =2H，C=1F。试求耦合电感元件的输入端口电压u 1 (t)和电容电流i C (t)。
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举一反三
【单选题】听力原文：M: I've been practicing that song all week, but I'm still afraid of standing in front of such a large audience. W: Just act as if they are all your friends and you'll be fine. Q: What does the wo...
A.
Join in the acting group to make a few friends.
B.
Sing the song for his friends first.
C.
Pretend that he is performing for his friends.
D.
Sit there to practice the song.
【简答题】城市轨道交通按运能范围、车辆类型及主要技术特征可分为哪几类?
【简答题】城市轨道交通按运能范围、车辆类型及主要技术特征可分为哪几类?各类的特征及优缺点?
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