名校
1 . 已知一组数据
,
,
,
是公差不为0的等差数列,若去掉数据
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcd5c11234a01e2b3d2861e9b3a3aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20c1e5866f81c045a596079ac4a7671.png)
A.中位数不变 | B.平均数不变 | C.方差变大 | D.方差变小 |
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2024-06-10更新
|
347次组卷
|
2卷引用:2024届山东省五莲县第一中学高考模拟(二)数学试题
2 . 已知函数
部分图象如图1所示,
,
分别为图象的最高点和最低点,过
,
作
轴的垂线,分别交
轴于
,
,点
为该部分图象与
轴的交点,
与
轴的交点为
,此时
.将绘有该图象的纸片沿
轴折成
的二面角
,如图2所示,折叠后
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615d92797597a4dfb0eba5b269085ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f82c58b91bbd77dcb82da9f73f3cc3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8831f6a36f2d7352e1c6e1dcac61e77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068882b775725e852b7817740705ae38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2443bacdbf97c978557ffdf3d691e2.png)
A.![]() |
B.![]() ![]() |
C.在图2中,![]() ![]() ![]() ![]() |
D.在图2中,若![]() ![]() ![]() ![]() ![]() ![]() |
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解题方法
3 . 如图,在直三棱柱
中,
,
分别为棱
上的动点,且
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d157676c47a9b8f102adb3734fee05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfb9c088a7422e95f747701a626513d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b1ba2e2dbab8c7bec0dad6b63fcc5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1055cc6113535d708228f1de3307d2f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de70098ff89ac12b26af3778683d7a25.png)
A.存在![]() ![]() |
B.存在![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() |
您最近一年使用:0次
2024-06-08更新
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837次组卷
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5卷引用:2024届山东省五莲县第一中学高三模拟预测数学试题
4 . 在平面直角坐标系
中,如图放置的边长为2的正方形
沿
轴滚动(无滑动滚动),点
恰好经过坐标原点,设顶点
的轨迹方程是
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f22fa66bd977256019ab7c42f66ac75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb80007983e5b99dcdeebf87d18ff4.png)
A.方程![]() ![]() |
B.![]() |
C.![]() ![]() |
D.对任意![]() ![]() |
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5 . 数据
的平均数为
,方差为
,数据
的平均数为
,方差为
,其中
,
满足关系式
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83590c4a7ea5636843dd4b60c67cb40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbe7f95b5d89f9409ec24536da9e826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a63cadbf6b0d54955a3c3d1b7a62b14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04bf6dfba68df65aec257b97efbed3b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb525270c748eddaaecc4a549cca250e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9289410bd35c9d57326b93cc7f4c4767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de122ae929b1acaff321dec137622ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1bfa25e98e62a0f6655cd205a0636c.png)
A.![]() |
B.若数据![]() ![]() |
C.数据![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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解题方法
6 . 已知函数
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67bef370cfd8a75a69201b9e096d2806.png)
A.![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2024-06-04更新
|
1106次组卷
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4卷引用:2024届山东省五莲县第一中学高三模拟预测数学试题
名校
7 . 使用统计手段科学预测传染病可以保障人民群众的生命健康.下表和散点图为某段时间内全球某传染病感染病例在第一次监测到之后数量随时间的变化,以时间为自变量
(单位为天),以监测到的病例总数为因变量
,选择以下两个回归模型拟合
随
的变化:回归模型一:
;回归模型二:
,通过计算得出
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dc3b431bcf6be3bcdd51a7d80c79c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e90d4e85b222d6be93f03bfef2565f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685a543ec7c3929c24b644ebe5c78c55.png)
![]() | 1 | 5 | 7 | 12 | 16 | 20 |
![]() | 2 | 9 | 12 | 29 | 63 | 101 |
A.使用回归模型一拟合的决定系数![]() ![]() |
B.通过模型二得出的经验回归方程的预报效果好于通过模型一得出的经验回归方程 |
C.在首例病例出现后45天,该传染病感染人数很有可能在200人左右 |
D.在首例病例出现后45天,该传染病的感染人数很有可能超过10000人 |
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2024-06-03更新
|
814次组卷
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2卷引用:山东省日照市五莲县第一中学2024届高三第三次模拟考试数学试题
8 . 已知函数
的部分图象如图中实线所示,图中圆
与
的图象交于
两点,且
在
轴上,则下列命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29602cbc73377b9e6dde14a1cccbf05a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
A.函数![]() ![]() |
B.函数![]() ![]() |
C.函数![]() ![]() ![]() |
D.若圆![]() ![]() ![]() |
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2024-05-31更新
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536次组卷
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3卷引用:山东省日照市2024届高三下学期校际联考(二模)数学试题
9 . 已知
是曲线
上不同的两点,
为坐标原点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1325c6fe42a9e5c04520d8a9bb6821b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e32872dda5ca6742af4822f35c9cd4bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.![]() |
B.![]() |
C.若直线![]() ![]() ![]() |
D.对任意位于![]() ![]() ![]() ![]() ![]() ![]() |
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解题方法
10 . 同时投掷甲、乙两枚质地均匀的硬币,记“甲正面向上”为事件
,“乙正面向上”为事件
,“甲、乙至少一枚正面向上”为事件
,则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() ![]() | B.![]() ![]() | C.![]() | D.![]() |
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2024-05-14更新
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878次组卷
|
3卷引用:山东省日照市2024届高三下学期校际联考(二模)数学试题
山东省日照市2024届高三下学期校际联考(二模)数学试题广东省韶关市乐昌市第二中学2024届高三下学期保温测试(5月模拟)数学试题(已下线)专题05 高二下期末考前必刷卷03--高二期末考点大串讲(人教A版2019)