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【单选题】
处于平衡态的一瓶氦气和一瓶氮气的分子数密度相同,分子的平均平动能也相同,则它们
A.
温度、压强均不同；
B.
温度相同，但氦气压强大于氮气的压强 ；
C.
温度、压强都相同；
D.
温度相同，但氦气压强小于氮气的压强。
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【单选题】The author calls those marketers 'visionary' mainly because______.
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they began talking about 'market segmentation' in 1960s
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they focus on 'market particles'
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【单选题】关于国内生产总值的说法，正确的是（ ）。
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国内生产总值又称为国民总收入
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【判断题】只有发达国家的对外直接投资才有生产效率寻求型为其动机。( )
A.
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B.
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【单选题】The working parent is not willing to listen to her （his） four-year-old child talking about his sandbox games because she （he） is__________. 查看材料
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