下列四个写法:①
;②
;③
;④
,其中错误写法的序号有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c72a043b48a590c8ec22b884caf3cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f583e3c1cfb1ea89a16a3e8f13bba3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b1186631f500271c0c5914fb073ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ab4fed9be13c5da9f13e140c0a0417.png)
A.① | B.② | C.③ | D.④ |
更新时间:2020-10-13 02:08:23
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【推荐1】给出下列关系:①
;②
;③
;④
;⑤
.其中正确的个数为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266f09fbc990873566085c3e6a77313b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9fe24ba608d6e16d59a0e240feab51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2bb94d67649524440ceea0e8864829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe31098454053f02f1391a68f7f80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0024b5e43d05ccb430f5c673b9964aeb.png)
A.1 | B.2 | C.3 | D.4 |
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名校
【推荐2】已知集合
,
,若
,
,则一定有( )
![](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/265e81e52218232e16c78f57b3aa0de9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e4385a7e7ee4fb31dc613395b2a936.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】已知集合
,则下列集合是集合M的子集的为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0cb23fed64d3fb4eae0d0e4a230f43.png)
A.P={-3,0,1} |
B.Q={-1,0,1,2} |
C.R={y|-π<y<-1,y∈Z} |
D.![]() |
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