2021高三·全国·专题练习
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1 . 如图,洛书(古称龟书),是阴阳五行术数之源.在古代传说中有神龟出于洛水,其甲壳上有此图象,结构是戴九履一,左三右七,二四为肩,六八为足,以五居中,五方白圈皆阳数,四角黑点为阴数.若从四个阴数和五个阳数中随机选取
个数,则选取的
个数之和为奇数的概率为( )
![](https://img.xkw.com/dksih/QBM/2021/4/8/2695582328741888/2696017219715072/STEM/fa8ba6e68aa84c3e9d7ec55a9c0ff162.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://img.xkw.com/dksih/QBM/2021/4/8/2695582328741888/2696017219715072/STEM/fa8ba6e68aa84c3e9d7ec55a9c0ff162.png?resizew=144)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 我国古代典籍《周易》用“卦”描述万物的变化.每一“重卦”由从下到上排列的6个爻组成,爻分为阳爻“
”和阴爻“
”,如图就是一重卦.在所有重卦中随机取一重卦,则该重卦恰有2个阳爻的概率是( )
![](https://img.xkw.com/dksih/QBM/2019/11/30/2345296117547008/2394061631168512/STEM/5c12cd1201bd45e09b5e843b71e76830.png?resizew=73)
![](https://img.xkw.com/dksih/QBM/2019/11/30/2345296117547008/2394061631168512/STEM/61aebad491124ebea7415102caee8dd8.png?resizew=29)
![](https://img.xkw.com/dksih/QBM/2019/11/30/2345296117547008/2394061631168512/STEM/1fbc89a462df4043b553e0c473fc1710.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2019/11/30/2345296117547008/2394061631168512/STEM/5c12cd1201bd45e09b5e843b71e76830.png?resizew=73)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-02-07更新
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187次组卷
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3卷引用:江苏省苏州市三校2020-2021学年高二下学期5月联考数学试题