1 . 有下述说法:①
是
的充要条件
②
是
的充要条件
③
是
的充要条件
则其中正确的说法有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f7c54faca6eac8af5309942062058d.png)
![](https://img.xkw.com/dksih/QBM/2020/6/3/2476771100467200/2477911357054976/STEM/5115f4f51bdf43549621bc39e2e157ed.png?resizew=2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb54b1b3617ebc502cb44194cbcd1dc.png)
![](https://img.xkw.com/dksih/QBM/2020/6/3/2476771100467200/2477911357054976/STEM/5115f4f51bdf43549621bc39e2e157ed.png?resizew=2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2128a00f52af4427721f0ebba591daa.png)
![](https://img.xkw.com/dksih/QBM/2020/6/3/2476771100467200/2477911357054976/STEM/5115f4f51bdf43549621bc39e2e157ed.png?resizew=2)
A.![]() | B.1个 | C.2个 | D.3个 |
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2020-06-05更新
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3卷引用:四川省自贡市田家炳中学2019-2020学年高二下学期期中考试数学试题
四川省自贡市田家炳中学2019-2020学年高二下学期期中考试数学试题四川省自贡市田家炳中学2022-2023学年高二下学期期中数学试题(已下线)1.4.2 充要条件(分层练习)-2021-2022学年高一数学教材配套学案+练习(人教A版2019必修第一册)