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【判断题】
寡头市场形成的基本条件是产品差别的存在。A.
正确
B.
错误
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【简答题】听短文。 1. Many American children do some work when they are _____. A. happy B. healthy C. free 2. People will give the kids some _____ after they help them. A. training B. money C. information 3. The ch...
【单选题】根据《铁路旅客运输办理细则》，线路中断，铁路组织已购票的被阻旅客换乘其他列车绕道运输变更座席、铺位时，()。
A.
补收或退还差额
B.
不补不退
C.
只补不退
D.
只退不补
【简答题】The idea that some groups of people may be more intelt than others is one of those hypotheses that dare not speak its name. But Gregory Cochran is 1 to say it anyway. He is that 2 bird, a scienti...
【判断题】Carved pumpkins are used to scare away vampires, according to some superstitious people.()
A.
正确
B.
错误
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