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【单选题】
运用戴维南定理求等效电阻时,电压源以 代替,电流源以 代替。A.
开路；短路。
B.
短路；开路。
C.
断路；开路。
D.
短路；短路。
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【单选题】--- What color is it? --- ______.
A.
It’s a red
B.
It’s the blue
C.
It’s red
D.
It’s Green
【单选题】It’s the second time that I in Beijing. What great changes! It’s years since I here last time.
A.
went; had left
B.
had been; left
C.
have been; left
D.
have; have left
【简答题】It’s the place where smart people make smart machines work even smarter. It’s also in the heart of sunny California, a great place to start a family and raise kids. What could be better? But something...
【单选题】It’s time that I my hair cut. It’s the fifth time that I to the barber’s shop.
A.
had; have gone
B.
have; have gone
C.
have; went
D.
had; go
【单选题】男性,20岁,右胫骨上端病理性骨折,手术后,病理诊断为骨肉瘤。符合此诊断的描述是
A.
交界性肿瘤
B.
出血、坏死
C.
肿瘤性类骨组织
D.
肿瘤性软骨
E.
由间变的梭形或多边形细胞组成
【简答题】It’s summer.In the United States，it’s the season of swimming pools，barbeques，camping and road trips. Road trip vacations where the car journey is part of the fun are especially popular with college st...
【简答题】RL一阶电路的零输入响应中，电感两端的电压按照什么规律变化？电感中通过的电流又按什么规律变化？RL一阶电路的零状态响应呢？
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