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【单选题】
《春秋》一书经过了的修订，它是（）A.
晋国的编年史
B.
齐国的编年史
C.
的编年史
D.
的编年史
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【简答题】已知图10中 I1=4A,I2=2A, I3=-2A,其他参数及参考方向如图所示。____试求元件两端电压Ux,并确定电路元件x是电源还是负载;____两个电阻上消耗的功率 第11题: V X =R 1 I 1 +E 1 =50V; Px=V 3 I 3 =-100WL 0 ; X是负载充电 P E =E 1 I 1 =400W____
【判断题】Attention shall be paid to the reference direction of current and voltage during superposition. If the divided current or voltage is the same as the reference direction of the current or voltage to be...
A.
正确
B.
错误
【简答题】Joe Smith has left a voice message for Lily. Listen for the message and fill in theblanks with what you hear. Lily, this is Joe Smith. Please reserve a seven day Yunnan highlight tour for 21 tourists,...
【简答题】归纳与抽象训练: Induction and abstract training: 本题要求各位同学感受数学建模的乐趣,学有余力的同学可以开展深入的研究。题目给出“2018年中国研究生数学建模竞赛B题”作为参考资料。 大家通过参阅参考资料,抽象出数字光纤通信系统中如果采用16QAM调制方式下,其信噪比的数学表达就可以啦^^。 要求给出公式并说明物理含义。 B:第十五届“华为杯”中国研究生数学建模竞...
【简答题】2 Complete the sentences. ► A sweater is often made of w ool . wool 1 Jewellery is usually made of s____ or
g____. 2 Toys are usually made of w____ or p____. 3 Bathroom and kitchen p...
【简答题】如图所示电路中,a、d两点与外电路相连,部分支路电流及元件的参数已在图中标出,求电流I1、I2和电阻R。
【简答题】Please translate the following letter into English. You are supposed to supply some necessary information such as the name, address and telephone number of a corporation..., etc. on your own as reques...
【简答题】Case One Dear Mr. Smith , (从我国驻贵国商务参赞处得知贵公司的名称和地址) as the leading importer of light industrial products in your country. We now . (利用此次机会给你方写信了解我方是否可以与你方建业业务关系 . , (为使你方了解我们经营的轻工业产品) , we are airmaili...
【简答题】电路及元件参数如图所示 (1)计算图a所示电路中A点的电位及电流I2,I3。
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