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1 . 下列命题是真命题的是( )
A.上底面与下底面相似的多面体是棱台 |
B.若一个几何体所有的面均为三角形,则这个几何体是三棱锥 |
C.若直线![]() ![]() ![]() |
D.正六棱锥的侧面为等腰三角形,且等腰三角形的底角大于![]() |
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7日内更新
|
130次组卷
|
2卷引用:河南省创新发展联盟2023-2024学年高一下学期第三次月考(5月)数学试题
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解题方法
2 . 正方形区域
由9块单位正方形区域拼成,记正中间的单位正方形区域为D.对于
边界上的一点P,若点Q在
中且线段PQ与D有公共点,则称Q是P的“盲点”,将P的所有“盲点”组成的区域
称为P所对的“盲区”.对于
边界上的一点M,若在
边界上含M在内一共有k个点所对的“盲区”面积与
相同,就称M是“k级点”;若在
边界上有无数个点所对的“盲区”面积与
相同,就称M是一个“极点”.对于命题:①
边界正方形的顶点是“4级点”;②
边界上存在“极点”.说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee82531a42c6f40585035798843b518e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26aae8b34c1ed7b4a6c31aefb4123df5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26aae8b34c1ed7b4a6c31aefb4123df5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
A.①和②都是真命题 | B.①是真命题,②是假命题 |
C.①是假命题,②是真命题 | D.①和②都是假命题 |
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3 . 已知
表示
这
个数中最大的数.能说明命题“
,
,
”是假命题的对应的一组整数a,b,c,d值的选项有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a6c3f9ff96135c3112eb0722a49fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe1c31a81f198c443e71b83ca662939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512789b0d256feb256ce8f01c9afe4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b33ff8346b233bd4721e7c1b67488e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a42f7c7e353ec3531302453f236a05.png)
A.1,2,3,4 | B.![]() ![]() |
C.8,![]() ![]() ![]() | D.5,3,0,![]() |
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4 . 下列命题为真命题的是( )
A.大于![]() | B.锐角一定是第一象限角 |
C.第二象限角大于第一象限角 | D.若![]() ![]() |
您最近一年使用:0次
2024-04-04更新
|
606次组卷
|
3卷引用:江西省部分学校2023-2024学年高一下学期开学考试数学试题
5 . 设
,
为不同的平面,
,
,
为三条不同的直线,则下列命题中为真命题的是( )
![](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/071a7e733d466949ac935b4b8ee8d183.png)
A.若![]() ![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
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6 . 下列命题的否定是真命题的是( )
A.每个正方形都是平行四边形 |
B.![]() ![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
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7 . 已知下列命题:
①命题“
,
”的否定是“
,
”;
②“
”是“
”的充分不必要条件;
③“若
,则
且
”为真命题;
其中真命题的个数为( )
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d3a6268e9eded3dba57ab5d93cf556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aec0693231f71fc10f820c41823dd37.png)
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055365d21f92fdb6881310bda08c3f75.png)
③“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34715101c66fa12ce6baf0a9c53f1672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
其中真命题的个数为( )
A.3个 | B.2个 | C.1个 | D.0个 |
您最近一年使用:0次
2023高三上·全国·专题练习
8 . 设有下列四个命题:
:两两相交且不过同一点的三条直线必在同一平面内.
:过空间中任意三点有且仅有一个平面.
:若空间两条直线不相交,则这两条直线平行.
:若直线
平面
,直线
平面
,则
.
则下述命题中所有真命题的序号是__________ .
①
;②
;③
;④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5493a7d6a94ddfc6179b9b30a92e4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aadec0da2c6fcca0bf2545bb62a4aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4ac8baf8dbbba3dd9933021a814d0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c60a302c4b1d8bc8c75cddae0cabc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f703808b3528bf794d8edf642de9c72e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233003466b5aae4068326b65b585335e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75350c0f16848247ec0602b0b9a55df.png)
则下述命题中所有真命题的序号是
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586e98555015d11f2b8d8b7702965336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7af433a01e0819931d64d634b705e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b4e53bf6e9c26e2f849d430d4e083f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b798cc94cdc2c9e71b9ab8227877ac2.png)
您最近一年使用:0次
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9 . 对于任意实数
,
,
,
,命题 ①若
,
,则
;②若
,则
;③若
,则
;④若
,则
;⑤若
,
,则
.
其中真命题的个数是 ( )
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef20073a12bab727faa217718b63414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34c5832f3fe28f48a924854cb8814ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c22b9d08cf536bbb76bce1b0f135772.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/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb54b1b3617ebc502cb44194cbcd1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cbc322861846709c08c7f1da746848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f50ce6b511e6b928796e048fc7fa5c.png)
其中真命题的个数是 ( )
A.1 | B.2 | C.3 | D.4 |
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10 . 下列是真命题的是( )
A.函数![]() ![]() |
B.不等式![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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