1 . 已知集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36113af7d0b0b4cf823babb95fb7536d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a80d7773cc765e127bdfb2122888504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 已知集合
,
,则
中元素的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d143cd21de2f99e5216587ee6644950a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9e3b93b797e87e69e1b29bc50628cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 已知集合
,则![](https://img.xkw.com/dksih/QBM/2016/8/10/1572971461476352/1572971467268096/STEM/06ea321cf3b9463daefe8c4c25cb20f9.png)
![](https://img.xkw.com/dksih/QBM/2016/8/10/1572971461476352/1572971467268096/STEM/72b65e342a9944188aab90e3d0555609.png)
![](https://img.xkw.com/dksih/QBM/2016/8/10/1572971461476352/1572971467268096/STEM/06ea321cf3b9463daefe8c4c25cb20f9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次