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搜题
【单选题】
在标志变异指标中,能相对反映总体各单位标志值变异程度的指标是( )A.
、平均差
B.
标准差
C.
全距
D.
离散系数
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举一反三
【单选题】For a nonrival good like pay-per-view television programs, the private market will lead to:
A.
production of too much of the good.
B.
consumption of too much of the good.
C.
consumption of too little of the good.
D.
outsourcing its production.
【简答题】代词 n. pro_____
【单选题】A public good is a good or service for which exclusion is _____ and which is _____ in consumption.
A.
possible; rival
B.
possible; nonrival
C.
not possible; rival
D.
not possible; nonrival