![电路分析中相量一章为什么20∠-90°A=-j20A?-]()
1、电路分析中相量一章为什么20∠-90°A=-j20A?-
答:[答案] j在复数里面是一个虚单位,是一个长度为1,角度为90°的一个复数.20∠-90°A 是指一个“大小为20 初相位为-90°的电流”的向量表达形式,在复平面内就是长度为20角度为-90°的有向线段.-j20就是一样的一条有向线段.(复...
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答:[最佳答案] 如果你有钱的话,你用跳关,用送的徽章升护卫到老兵,升法师到精英,护卫招2个其他的全法师,过30后你小心屠夫就可以了
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3、3、哪一部作品是解放区前期的文艺作品-上学吧找答案-上学吧普法...
答: 下列反映 40 年代解放区“土改”生活的作品是() A.《月牙儿》 B.《菉竹山房》 C.《太阳照在桑乾河上》 D.《山峡中》 青少年普法 更多 > 谢谢您的反馈 您认为本题答案有误,我们...
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