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变压器的原绕组 880匝接在220V的交流电源上,要在副绕组匝数 24匝 ,若在副绕组上接有 2 Ω 的电阻则原绕组中的电流为 A.
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【简答题】After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had news to report: The damage and death toll could have been much worse. More than 60 people died in this earthquake...
【单选题】Passage Three Question 22to 25 are based on the passage you have just heard. 22 A) She could drive a car though she was overeighty. B) Sheviolated the traffic rules but escaped being caught. C) She ha...
A.
She could drive a car though she was overeighty.
B.
She violated the traffic rules but escaped being caught.
C.
She has never made any driving mistakes before.
D.
She was never punished for any traffic violation.
【简答题】After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had good news to report: The damage and death toll(死亡人数) could have been much worse. More than 60 people died in this...
【简答题】希望小学有图书57686本，这是一个精确数．______．
【简答题】The problem was that 10% was a large raise compared to the 5% other employees had received. Was there a win-win ( 双赢 ) way out of this problem? As they looked at the possibilities, several ideas appea...
【简答题】有5个阻值相同的电阻，并联后接在20V的电源上，测得总电流为0.5A，则各电阻消耗的功率分别为 W
【简答题】The traffic was so much noise that I couldn’t hear what he ______. A) is saying C) has said B) was saying D) will say
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