1 . 2020年是我国脱贫攻坚决战决胜之年,某县农业局为支持该县的扶贫工作,决定派出8名农技人员(5男3女),并分成两组,分配到2个贫困村进行扶贫工作,若每组至少3人,且每组都有男农技人员,则不同的分配方案共有______ 种(用数字填写答案).
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2020-10-08更新
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1666次组卷
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7卷引用:天津市第四中学2021-2022学年高二下学期期中数学试题
2 . 下列命题:①设A,B为两个集合,则“
”是“
”的充分不必要条件;②
,
;③“
”是“
”的充要条件;④
,代数式
的值都是质数.其中的真命题是________ .(填写序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ceb1f338fa60976229d7ec6531b626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35eac3ba2858adffcd1f8052cd795269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64713e05157d31d2fb54e3875a1f87a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93c0412463cd2cacd401f61d10e2d4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a252bcc22540b44485125d23e04f93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f99a78f0c009e143c7fd5465b3d8fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aedd75663c317a11fc7031681114752.png)
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名校
3 . 对于实数
,有下列命题:①若
,则
;②若
,则
;③若
,则
;④若
,则
;⑤若
,
则
,其中真命题为(填写序号)______________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13c960fa57440fcabc5b2cc086ccc64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c22b9d08cf536bbb76bce1b0f135772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca24341509c05e672999202f2df0ebaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2ca67148f90890830b769c6a92c0be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5842f47b99932df68efbb64eb847e956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84190b06a0471df3799913007e72e064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8201ff29a2091d40eee10db6bbc1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
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4 . (A类题)已知
,
是两个不同的平面,
,
是两条不同的直线,给出条件:①
;②
,
;③
,
,
,上述条件中能推出平面
平面
的是__________ (填写序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9dc56e79c42bb90c20ae2c17ec6fb39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675f1e09eb033dab8ef96d1f1c349150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f345365fe0a1986b80299f7a99a306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae854eaf0f2d3b326e91de0914d059e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61d302a8bdfffcc0a0ede8bcf59491d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5475e10ea3f37788e680395999037a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c448678d3ff980608037d00d94e9bcfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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