下列说法中正确的个数是
①若两个平面
,
,
,则
;
②若两个平面
,
,
,则
与
异面;
③若两个平面
,
,
,则
与
一定不相交;
④若两个平面
,
,
,则
与
平行或异面;
①若两个平面
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/b37d21c90ec447609e92d1e139f719e9.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/68ad003e4fd14d2cb1919953aad7b8e6.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/a86407bfcd7a4d82bea00a540d95687a.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/9c26fee843a840a2ad0abd845efc7964.png)
②若两个平面
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/b37d21c90ec447609e92d1e139f719e9.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/68ad003e4fd14d2cb1919953aad7b8e6.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/a86407bfcd7a4d82bea00a540d95687a.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/adb4fba4754540efb8f6bc8ac8db07b2.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/b0ecaa15ed8b4a85bb6c2701eba198a8.png)
③若两个平面
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/b37d21c90ec447609e92d1e139f719e9.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/68ad003e4fd14d2cb1919953aad7b8e6.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/a86407bfcd7a4d82bea00a540d95687a.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/adb4fba4754540efb8f6bc8ac8db07b2.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/b0ecaa15ed8b4a85bb6c2701eba198a8.png)
④若两个平面
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/b37d21c90ec447609e92d1e139f719e9.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/68ad003e4fd14d2cb1919953aad7b8e6.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/a86407bfcd7a4d82bea00a540d95687a.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/adb4fba4754540efb8f6bc8ac8db07b2.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619433740492800/1619433740664832/STEM/b0ecaa15ed8b4a85bb6c2701eba198a8.png)
A.0 | B.1 | C.2 | D.3 |
更新时间:2016-12-24 14:44:07
|
【知识点】 平行公理
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【推荐1】设x、y、z是空间中不同的直线或平面,对下列四种情形:
①x、y、z均为直线;②x、y是直线,z是平面;③z是直线,x、y是平面;④x、y、z均为平面,其中使“x⊥z且y⊥z⇒x∥y”为真命题的是
①x、y、z均为直线;②x、y是直线,z是平面;③z是直线,x、y是平面;④x、y、z均为平面,其中使“x⊥z且y⊥z⇒x∥y”为真命题的是
A.③④ | B.①③ |
C.②③ | D.①② |
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【推荐2】已知
,则直线
与平面
内的所有直线的位置关系为
![](https://img.xkw.com/dksih/QBM/2015/8/14/1572214065676288/1572214071222272/STEM/2fb437a228f14f2d9b0383f624765e75.png)
![](https://img.xkw.com/dksih/QBM/2015/8/14/1572214065676288/1572214071222272/STEM/d4786e4e066e41e59a648a0e5fa60a34.png)
![](https://img.xkw.com/dksih/QBM/2015/8/14/1572214065676288/1572214071222272/STEM/9924fbf83b994868936fced686fcfa25.png)
A.平行 | B.相交 | C.平行或异面 | D.异面 |
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