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【单选题】
完全竞争企业所面临的需求曲线同时也是( )A.
总收益曲线
B.
平均收益曲线
C.
边际收益曲线
D.
B与C
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【单选题】When the trouble took place, the Olympic Games______.
A.
were completed
B.
were going on
C.
were to be finished
D.
were to take place
【简答题】A．When they were not willing to appear shy. B．When they were not willing to be inspected by their leader. C．When they were not willing to be examined about their uniform. D．When they were not willing ...
【单选题】Lack of teamwork can result in _____by rivals when we have a basketball game.
A.
defeated
B.
being defeated
C.
defeating
D.
to be defeated
【简答题】A．When the dustbins were not emptied during the strike. B．When some jokes were made about the work of the dustmen. C．When there were so many dustbins in every backyard in the country. D．When the dustm...
【单选题】_______ on your study, and you will make greater progress．
A.
Concentrating
B.
If you concentrate
C.
Concentrate
D.
To concentrate
【简答题】图所示电路中含有理想变压器，原边匝数为N 1 ，副边匝数为N 2 ， 。当原边分别由电流源i S 与电压源u S 激励时，在保持原边匝数N 1 不变的前提下，若要使R 2 上的功率增加，副边匝数N 2 应增加还是减少?请说明理由。
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