已知
是两条不同的直线,
是一个平面,以下命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398fcd2493696aefeb0574d425e67022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() ![]() |
20-21高二下·上海静安·期末 查看更多[2]
更新时间:2021-08-10 17:19:02
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【推荐1】已知平面
以及不重合的直线
、
、
.
①若
,
,则
;
②若
,
,则
;
③若
,
,则
;
④若
,
,则
.
以上说法正确的有( )个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057cdb4057bca398a838e868efd360f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d4fc47a5814493cc5facdc3ab296dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff4e42856fa5f6a4e12993e53b065e3.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff4e42856fa5f6a4e12993e53b065e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e7f48cb7e14361e0e7b20eae592cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1dd133d58073910a0bf45dfaf970130.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057cdb4057bca398a838e868efd360f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d4fc47a5814493cc5facdc3ab296dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2293799d379200cf746e8450ebd5744f.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff4e42856fa5f6a4e12993e53b065e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e076b91a9178217532e11c496400e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d07324ee4dec98ce18a2f37728791b.png)
以上说法正确的有( )个
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】设
是三个不同的平面,a,b是两条不同的直线,则下列命题中为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() |
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【推荐1】在正四棱柱
,点P满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ef266ddf046f74a5e0d54863b349a9.png)
,则下列说法不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ef266ddf046f74a5e0d54863b349a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4384ea0424c52069cf110ed0cf68df0.png)
A.三棱锥![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,已知长方体
,点E是棱
的中点,
平面
,则( )
![](https://img.xkw.com/dksih/QBM/2021/7/30/2775558085312512/2793123646160896/STEM/19e2b291-078f-440c-b2cb-c459ca07ad6c.png?resizew=225)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4508dc6d9c91157836be679c0543cac.png)
![](https://img.xkw.com/dksih/QBM/2021/7/30/2775558085312512/2793123646160896/STEM/19e2b291-078f-440c-b2cb-c459ca07ad6c.png?resizew=225)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
【推荐1】一平面截空间四边形的四边得到四个交点,如果该空间四边形只有一条对角线与这个截面平行,那么这四个交点围成的四边形是( )
A.梯形 | B.菱形 | C.平行四边形 | D.任意四边形 |
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【推荐2】若
,
是两个不同平面,
,
是两条不同直线,为使命题“
,
,
,______
”成为真命题,横线上应填入( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58645e141cf81e1962ec8692e5edbfa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0b6b4e39fb45811104b39614ad8e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a042a14e1c3c915ad11544c9e1e57da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a6b3a66b55035b66d77bd1b81614c4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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