1 . 已知集合
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3344b4b2541031b88aa04025bbcd82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e2e2ec4f698e412521b42cc284217e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c59a49dfb4d2acb4aabfdf1e1004019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fed3bd5bc925cf990e057f43395bff.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . 已知函数
为偶函数,若函数
的零点个数为奇数个,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92146c133ba2bdbda499f5af2bdda022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f6aeed19e3b51453904fe44d5f4c247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92682840e2a230de346562b2032f8adb.png)
A.1 | B.2 | C.3 | D.0 |
您最近一年使用:0次
解题方法
3 . 已知直线
与椭圆C:
交于
,
两点,以线段
为直径的圆过椭圆的左焦点
,若
,则椭圆
的离心率是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa841ce5d58b64f747a3c1b69bb20a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a68adf4c6ee501003a865acf4c23bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 已知函数
的图象关于点
对称,若当
时,
的最小值是
,则
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0a58a3197548482162707f8aa0c4db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84e2a02b32a01b13d65e5e9c4554c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c91675537f467e914d234baa216245be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
5 . 在
中,内角A,B,C所对的边分别为a,b,c.若
,则A等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe839d257c335907329af137f1ca069.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 已知实数
,若
,且这四个数的中位数是3,则这四个数的平均数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f231fa3b79f7545a0ac5e70c6e924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4477f01e29104dafaadb67f1813b4eb2.png)
A.![]() | B.3 | C.![]() | D.4 |
您最近一年使用:0次
7 . 设m,n是两条不同的直线,α,β是两个不同的平面,则下列命题中正确的是( )
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
8 . 已知集合
,
,则
=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f619e228de6f72dabf1ac68828a410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a09dde655ee4067f30349a03cd5f992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
9 . 已知甲组数据由
这
个数据构成,记这组数据的平均数为
,方差为
;乙组数据由
,
这
数据构成,记这组数据的平均数为
,方差为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0494c6d226729dd902a2940ab7228fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288fe3e82e74b326e19704887ba71f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c7bb6fb4b26508ec5f6f62ee846cb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0494c6d226729dd902a2940ab7228fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288fe3e82e74b326e19704887ba71f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a439b62ead91b1481d1f85e3ee8cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9e60e949f1626a58a8c0eb756f580d.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
10 . 设
,
,
,则a,b,c的大小关系为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb9fe671dc0ae44a46d3bdb398aaaffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a62b3590ff2f648d629fd0799d1f4743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f51b6e0abc15f53a0511198a217eab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次