求解大神这是什么歌求解

大神求解,谢谢_百度知道
大神求解,谢谢
、单选题(共 25 道试题共 100 )V1.
The bridge is ________ construction.A. inB. withC. underD. during
As ________, he did not show up at the party.A. was expectedB. would be expectedC. had been expectedD. expected
She sang ________, but the show was a failure.A. enough goodB. good enoughC.
enough wellD. well enough
John: Well, it’s getting late. Maybe we could get together some other time.Harry: _________.A. Take it easyB. Nice to see you backC. Sounds goodD. I’ll give you a callE. Yes,I’ve enjoyed it
If _______ into fire, paper will burn.A. throwingB. to throwC. threwD. thrown
Caller: Hi, is Jill there, please? Mary: __________A. Hold on. I'll get her.B. No, she isn't here.C. Yes, she lives here.D. Yes, what do you want?
His death resulted ______ the accident.A. inB. atC. fromD. of
Steve:Can I get you a cup of coffeeJulia:______A. I don't take sugar, thank you.B. You can, please.C. Thank you for the coffee.D. That's very nice of you.
The price is $14.90, _________ postage.A. includesB. includingC.
to includeD. included
He saved the child's life at the _______ of his own life.A. spendingB. serviceC. costD. value
I spent two hours ______ my report.A. to writeB. writtenC. writingD. write
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出门在外也不愁急急急,各位大神求解
[问题点数:20分,结帖人erdaduzi]
急急急,各位大神求解
[问题点数:20分,结帖人erdaduzi]
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转载文章请注明出自“CSDN(www.csdn.net)”。如是商业用途请联系原作者。用戴维宁定理求下图电路的u? 大神求解啊答案是3v
方法很简单,就是将待求电阻两端看进去的电路化为戴维宁诺顿等效电路。先化简上方电流源和电阻等效的诺顿电路变成3V与3欧的戴维宁电路。再对整体求解戴维宁电路即可:开路电压为12V,短路电流为1A,所以整体等效戴维宁内阻为12欧。所以3欧电阻分压为2.4V,个人觉得答案有问题...
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