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8

A. Thesportsplayedinsummer.
B. Thesportsplayedindoors.
C. Theinfluenceofgreatathletes.
D. Theinfluenceofgovernmentsandsponsorship.

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9

A. Movesomesummersportstothewintersports.
B. IntroducesomenewsportstotheOlympics.
C. Reducesomeindoorsummersports.
D. GetallcountriesinvolvedintheOlympics.

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10

A. Hewillpaycloseattentiontohisowncountry.
B. HewillspendoverfourhoursaweekwatchingTV.
C. Hewillfocusonskiingandhockey.
D. Hewillmakeagoodscheduleofwhattowatch.

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设A={a,b,c}，A上二元关系R={〈a,a〉，〈b,b〉,〈a,c〉}，则关系R的对称闭包S(R)是( )

A. R∪IA
B. R
C. R∪{〈c,a〉}
D. R∩IA

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如果数据为左偏分布，下列叙述中正确的是（）。

A. 均值在众数的右侧
B. 均值等于中位数
C. 分布的“尾部”在图形的右边
D. 均值在中位数的左侧

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8

A. Thesportsplayedinsummer. B. Thesportsplayedindoors. C. Theinfluenceofgreatathletes. D. Theinfluenceofgovernmentsandsponsorship.

9

10

设A={a,b,c}，A上二元关系R={〈a,a〉，〈b,b〉,〈a,c〉}，则关系R的对称闭包S(R)是( )

如果数据为左偏分布，下列叙述中正确的是（）。

A. Thesportsplayedinsummer.
B. Thesportsplayedindoors.
C. Theinfluenceofgreatathletes.
D. Theinfluenceofgovernmentsandsponsorship.