给出下列命题:
①如果
,
是两条直线,且
,那么
平行于经过
的任何平面;
②如果直线
和平面
满足
,那么直线
与平面
内的任何直线平行;
③如果直线
,
和平面
满足
,
,那么
;
④如果直线
,
和平面
满足
,
,
,那么
;
⑤如果平面
,
,
满足
,
,那么
.
其中正确命题的序号是__________ .
①如果
![](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/6d553efed052e7e0777728ef622a5c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
②如果直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae854eaf0f2d3b326e91de0914d059e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
③如果直线
![](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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae854eaf0f2d3b326e91de0914d059e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61d302a8bdfffcc0a0ede8bcf59491d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d553efed052e7e0777728ef622a5c39.png)
④如果直线
![](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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d553efed052e7e0777728ef622a5c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae854eaf0f2d3b326e91de0914d059e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6784912a159b0be1bf836f985b0c2794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61d302a8bdfffcc0a0ede8bcf59491d.png)
⑤如果平面
![](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/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3b5a835220f38afd0352c65f4835471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e726d42f7db53c07833d03f9938095d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de666db0febae223cc4d1dc189d71ca6.png)
其中正确命题的序号是
更新时间:2018-07-17 14:23:24
|
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填空题-单空题
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适中
(0.65)
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解题方法
【推荐1】在棱长为1的正方体
中,点
、
分别是线段
、
(不包括端点)上的动点,且线段
平行于平面
.若
,则四面体
的体积为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a949c00526fddf435423272cf10f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22ebcc4aa98d46366df48f751a5f368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d827d4b633a81a1ae4cd2e9fedc494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934ffeb85058e657412b8d6b80d52a54.png)
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【推荐2】在三棱锥S﹣ABC中,
是边长为4的正三角形,
,平面DEFH分别与AB,BC,SC,SA交于D,E,F,H且D,E分别是AB,BC的中点,如果直线SB∥平面DEFH,那么四边形DEFH的面积为__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b79ff3246039cc3e55cf372ab207506.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/eadf9efb-9698-440f-af4e-a0a0929643d4.png?resizew=214)
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【推荐1】如图所示,正方体
的棱长为1,线段
上有两个动点
、
,且
,则下列结论中正确的是________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/f438ce0b-c883-4e51-a5e2-c295345f58be.png?resizew=156)
①
平面
;
②
的面积与
的面积相等;
③平面
平面
;
④三棱锥
的体积为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.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/e438a162ed349f7f25333e8f6c044e6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/f438ce0b-c883-4e51-a5e2-c295345f58be.png?resizew=156)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f201a40fedca4ad14db193f4db2127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b285934db0cd25f729d8eb2ab4b8524.png)
③平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ce82a4c37365f2d4dea2c4ad2e3288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90deda6e128fade762bdb3b74bedf511.png)
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【推荐2】如图,在透明塑料制成的长方体
容器内灌进一些水,将容器底面一边
固定于地面上,再将容器倾斜,随着倾斜角度的不同,有下列四个说法:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/58041243-a033-4fca-8633-a957da9bfdb7.png?resizew=164)
①水的部分始终呈棱柱状;
②水面四边形
的面积不改变;
③棱
始终与水面
平行;
④当
时,
是定值.
其中正确说法是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/58041243-a033-4fca-8633-a957da9bfdb7.png?resizew=164)
①水的部分始终呈棱柱状;
②水面四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
③棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/988a1bc5976c40ba061816c962b4ed31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74df87fcc553dcb1d4d042252383b037.png)
其中正确说法是
您最近一年使用:0次
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解题方法
【推荐1】在棱长为1的正方体
中,
为线段
上的动点,下列说法正确的是________ .(1)对任意点
,
平面
; (2)三棱锥
的体积为
;(3)线段
长度的最小值为
;(4)存在点
,使得
与平面
所成角的大小为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c99cda5a272bbe32b28575fa51b9f6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0fcc31afda6b671c3bee982197af6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
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【推荐2】已知直线
平面
且
⊥
,
,给出下列四个命题:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ccc19a183b9ce7f82d2609a14b9a43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f157205cb5cb4a538b09d989f2d9ae95.png)
①若∥
,则
⊥
;②若
⊥
,则
∥
;
③若⊥
,则
∥
;④若
∥
,则
⊥
其中正确的命题有
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