“
”是“
、
、
为三角形的三个顶点”的( )条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7633df090124d0863b1b227fca2d09ec.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
A.充分非必要 | B.必要非充分 | C.充要 | D.非充分非必要 |
更新时间:2021-12-10 11:40:58
|
相似题推荐
单选题
|
较易
(0.85)
【推荐1】“
中至少有一个小于零”是“
”的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8d93ef14e700c6bed4e4d31625925a.png)
A.充分非必要条件 | B.必要非充分条件 |
C.充要条件 | D.既非充分又非必要条件 |
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【推荐2】已知p是r的充分不必要条件,q是r的充分条件,s是r的必要条件,q是s的必要条件,下列命题中:①r是q的充要条件;②p是q的充分不必要条件;③r是q的必要不充分条件;④r是s的充分不必要条件.
正确命题的序号是( )
正确命题的序号是( )
A.①④ | B.①② |
C.②③ | D.②④ |
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解题方法
【推荐1】在
中,
,记
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b2b7db8565506b92293f4a15ec9e61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8a8c17891ffbda9b616bee26d67e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8682ba80b5d1e124e98c8661c753a19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f03267ec183b76191ada83cc5a20ba9c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,四边形
是等腰梯形,
、
分别是腰
、
的中点,点
是
的一个三分点,
,若
,则
( )
![](https://img.xkw.com/dksih/QBM/2021/7/5/2757524930027520/2780134464897024/STEM/1f0cbee9-59b3-41fd-8bcd-b5279345ed50.png?resizew=288)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12143a06ed24558d8cc7ad39961d3e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d38f5160866c48a48c80ab3bca706b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96724b211bf3e56d588bd430aa3f2894.png)
![](https://img.xkw.com/dksih/QBM/2021/7/5/2757524930027520/2780134464897024/STEM/1f0cbee9-59b3-41fd-8bcd-b5279345ed50.png?resizew=288)
A.![]() | B.![]() |
C.![]() | D.![]() |
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