1 . 已知
,集合
,则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7407da54d699e6bdf1c44903e19a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35a2410ce34b36954ed4923e600d42f5.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分又不必要条件 |
您最近一年使用:0次
名校
2 . 已知集合
,若集合
满足
且
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfaf2133a57a1ba37929353a7e872b77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e544b1304a6bbc87283cf741f134cebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503063d36255ecb333cec1f27ec69b63.png)
A.![]() | B.![]() |
C.集合![]() | D.集合![]() |
您最近一年使用:0次
名校
3 . 已知集合
的子集中含有3个元素的子集记为
.记
为集合
中的最小元素,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f254b378cfc6b6a60a32fd6ad670d2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60be7d1bf962492cfbc6b930599cf130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a584b6ad5577ab3e2d22caf23e3c32b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d3e8aa834a3d720620390ed8805fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e967fb493fcf466618b30cdb4ef165f.png)
A.55 | B.70 | C.89 | D.630 |
您最近一年使用:0次
名校
解题方法
4 . 已知集合
,若
,则实数a的值可以是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faf19150cfc768b8430c9ee5db9f40e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
A.![]() | B.![]() | C.0 | D.![]() |
您最近一年使用:0次
名校
5 . 下列四个命题正确的个数是( )
①
是空集;②若
,则
;③集合
有两个元素;④集合
是有限集
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f88eb4061565a2dcc6735dd0c13dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a7e34f15b46c51888ad96b233f0f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/820ec56460819f6778374192faa907ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addbfadc2089e698885912b0f83e3f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b94935d206624493c9093d3f403b59a.png)
A.1 | B.2 | C.3 | D.0 |
您最近一年使用:0次
名校
6 . 已知集合
,若
,则
可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb2c3f3fc00d287887c3187cf1fe1ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c3056c140df92836ff95dc3a6753ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.1 | C.2 | D.3 |
您最近一年使用:0次
7 . 己知全集
,集合
,集合
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0138bfb7407fc0af212dc439d705cfb3.png)
_______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f712c090c0ee3236ec7e9ddba42e960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea88acab872f6ba76c8c092e114b63f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73bdbc9e0aa626fff7241e707e67575c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0138bfb7407fc0af212dc439d705cfb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
您最近一年使用:0次
名校
8 . 已知集合
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e813312cfb7e65645f1939d7fc83635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68add8639429ac500d3e4af228711a2c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
9 . 已知集合
,
,若
,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6908b215e9e8c64667d15b18b408567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c085a3a5ad2be59fbd2891e7af8f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
10 . 已知集合
,
,则下列结论不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e301a893b4e5f9ed35fd913db9c32c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d381490baa0956cf2bdd3b21a2a43397.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次