1 . 如图,
,
是离心率都为
的椭圆,点A,B是分别是
的右顶点和上顶点,过A,B两点分别作
的切线
,
.若直线
,
的斜率分别为
,
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/bde56b8b-569f-4c5f-93d7-78f2e7d2acab.png?resizew=187)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211b9e53e4677ae9e2b20d5f7ce0a4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a52e26180930ad5b56a8a45f28a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3da5d51cc23527feb04b419f83ec50c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a52e26180930ad5b56a8a45f28a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211b9e53e4677ae9e2b20d5f7ce0a4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce619c464f2aa04178ea0111ba60544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d9ccc4246c82939d8a659db9f28a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce619c464f2aa04178ea0111ba60544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d9ccc4246c82939d8a659db9f28a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2562424a83aae7e4b3f8adf90307961a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b58edb637c5dfa03794f3952de9d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8178a9bdd5f28b2eff1f886b5ab0fcb5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/bde56b8b-569f-4c5f-93d7-78f2e7d2acab.png?resizew=187)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 双曲线
上格点(横纵坐标均为整数的点)的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba75ed540b7fab835e4548a8b0a801e9.png)
A.0 | B.4 | C.8 | D.12 |
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3 . 平面
与长方体的六个面所成的角分别为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c9121cede0ee0562e23b8a26b34616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eec076403fb5f7e7ee03ba2231ed815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1462beec3a6d100890d5295ddd3edee1.png)
A.2 | B.3 | C.4 | D.6 |
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4 . 若圆柱被一平面所截,其截面椭圆的离心率为
,则此截面与圆柱底面所成的锐二面角是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 小王在word文档中设计好一张A4规格的表格,根据要求,这种规格的表格需要设计1000张,小王欲使用“复制—粘贴”(用鼠标选中表格,右键点击“复制”,然后在本word文档中“粘贴”)的办法满足要求.请问:小王需要使用“复制—粘贴”的次数至少为( )
A.9次 | B.10次 | C.11次 | D.12次 |
您最近一年使用:0次
6 . 已知一双曲线的两条渐近线方程为
和
,则它的离心率是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b386e2c5d9ad7cec404ce5c40dbebe42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc261508f42e75323971f0b8282b0ab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 在空间直角坐标系中,已知O(0, 0,0),A(1,0,0),B(0,1,0),C(0,0,1),则到面OAB、面OBC、面OAC、面ABC的距离相等的点的个数是( )
A.1 | B.4 | C.5 | D.无穷多 |
您最近一年使用:0次
2018-12-21更新
|
263次组卷
|
3卷引用:2018贵州高联初赛试题
8 . 已知等差数列
及
.设An=a1+a2+
+an,Bn=b1+b2+
+bn,若对
,有
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b468786c8644db94f4aa5b781478f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daca83a7d5dd024f1b7338df1377bf48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a67649ce7b7b3f072c6810fb0108065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b468786c8644db94f4aa5b781478f3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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