问题
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理想气体流过阀门(绝热节流),前后参数变化为()。A.△S>0,△T=0B.△T≠0,△S>0C.△S<0,△T=0D.AS<0,△T>0
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Nowadays, many coined words such as Chaonv emerge. Some people say these words are simple
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In the 1920s, ______emerged as the creative center for jazz.A.ChicagoB.Los AngelesC.New Yo
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The newly released novel was______as to arouse so much sensation among the young people.A.
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In the author’s opinion, advertising ________.[A] emerges in the wake of the anti-happy
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设有文法G(S): S→AB|AS A→aA|a B→b 文法G(S)与下面正规式等价的是____