名校
1 . 下列命题中真命题的个数是
①
,
;
②若“
”是假命题,则
都是假命题;
③若“
,
”的否定是“
,
”
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e7619820564623f779c704740bcc9c.png)
②若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
③若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5a3adbd45d73b61624ebff81725769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc6252b12df14414d6ebfe03749b4b5.png)
A.0 | B.1 | C.2 | D.3 |
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2016-12-04更新
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456次组卷
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7卷引用:安徽省阜阳市第一中学2018-2019学年高二下学期期中数学(文)试题