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电流源电压源是否真实存在电流源电压源难道真实存在吗?现实中哪些电源是电流源哪些是电压源,如果真实存在,为什么会出现两者矛盾的情况,希望哪位大大,为什么开路的电流源有电流流过, 电压是否在电路中处处存在 Is this an action movie?将主语改为复数 没有电流的情况下有没有电压? 没有电流有电压吗? 能否说在电路中电压为0V就没有电流 英文译成汉语（八上57,60）第一：As the traffic is crowded in the morning,sometimes he's late for the work.第二：Joma,(china) Michiko,(Japan )Masha,(Russia )Andrew,(the UsA) 第三：She added that having talks with friends was not help 英文译成中文 （57）He said that a toilet was a great place for artistic expression because art is a form of relief in the same way that going to the toilet is.(公厕改成博物馆）劳驾! 为什么说毛泽东思想与中国特色社会主义理论体系既一脉相承又与时俱进 为什么说毛泽东思想和中国特色社会主义理论体系是一脉相承的理论? 中国特色社会主义观理论体系是同马克思列宁主义,毛泽东思想既一脉相承又与时具进的科学体系 中文：相信自己,永远微笑～英文怎么说＞ 有没有高中英语短语的记忆方法 香瓜主蔓长到多长要掐头 大棚西瓜座不上瓜是怎么回事 销售这个职业能锻炼一个人英文怎么说? shoe什么意思?急呀! NICK CAVE AND THE BAD SEEDS GOD IS IN THE HOUSE怎么样 这种耳机插头该怎么接线?就是麦克风的两根线该接四个触点的哪几个?耳机的线该接在哪几个触点? TEEL ME WHY LIFE 电视里引入广告用英语怎么说 stopper 是什么意思知道的告诉我 3K由帮我解答下这几句短语是什么意思.tear off the foil on the top of bottle completely.for seal,draw the stopper down against the top bottle.forrelease,push the bottom and take the stopper off. cork stopper,crown stopper,screw stopper shoe什么意思 stopper在机械中是什么意思 something是什么意思 something是什么意思啊 英语sth什么意思? --Let's go for a long walk into the country this morning.--______,but I think I'm catching a coldA.I certainly could use the exerciseB.Yes,let's goC.Sure.I'd like to go for a long walkD.No,I won't 我们英语书上有一句话是Someone saw him walk into that building at about three this afternoon.为什么句中要用walk,而不用walking,有一句型不是see sb doing sth Today is my birthday.This morning,I taked a walk.Now gradually into the winter,the leaves on thetrees fall down and drifting profusely and disordly.Branch was empty,feel a kind of pure and fresh feeling.Later,I wrote my homework at home,to the aftern 英语翻译