命题
,命题
,则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2703a11493809ce0b7cf398a8c0dfa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379b0c16bae1def890867d2adf588b01.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2021-12-16 15:47:32
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相似题推荐
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【推荐1】命题
:
是
的充分不必要条件;命题
:
是
的充要条件,则以下为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734a6a1d319648bb969845a9159cdba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc3129244f8ed5b406c4e1863b8cf9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efcf268fb9d95f033c196f72ca517351.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】设命题
:
,
;命题
:若
,则
,则下列命题为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31103b60ec1f197dedfa3847911de83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f7c54faca6eac8af5309942062058d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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【推荐1】命题
,使
,命题
,都有
.给出下列结论:
①命题“
”是真命题②命题“
”是假命题
③命题“
”是真命题④命题“
”是假命题
其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fbaf82fe2b22d44492a001a7a02466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/830d96ab5c30d330cc9b176776780821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a6fc004861e4a5780736acea3a9e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547adc121c442b3bb9189e6df5ee4018.png)
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e29e70dc0bc2a9cf1a5feb67d439566.png)
③命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f602c916a51570813855222577ba372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68befa27a996e2b6543eaf7e36b0091.png)
其中正确的是( )
A.①②③ | B.②① | C.②③ | D.③④ |
您最近一年使用:0次
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【推荐1】已知命题p:“∃x>1,x2﹣x﹣1>0”的否定是“∀x≤1,x2﹣x﹣1≤0”;命题q:在△ABC中,“sinA>sinB”是A>B”的充分条件,则下列命题是真命题的是( )
A.p∧q | B.p∨(¬q) | C.(¬p)∧(¬q) | D.p∨q |
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【推荐2】已知集合
,下列命题为假命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26360ff0a2b9bbf5bf3200b22f19bf66.png)
A. ![]() | B. ![]() |
C. ![]() | D. ![]() |
您最近一年使用:0次