设集合
,集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dc60dac5c008368c97befeef85a0f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f6ce8346d9abc411f0589bcab4106c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-12-29 04:44:26
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【推荐1】已知集合
,
,则
子集的个数为
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572502490578944/1572502496157696/STEM/eba5cd4abd364e65a69a9d6d7f34a390.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52dc452eb596f0163782cf0cabf9e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d259db9bb0e132881e875a77d324057.png)
A.0个 | B.1个 | C.2个 | D.3个 |
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