名校
1 . 如图,已知四棱锥
的底面ABCD为平行四边形,M是棱
上靠近点D的三等分点,N是
的中点,平面AMN交
于点H,则,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5e505ae02fb5ba1859c70c5fec7ab5.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec35c2182c5e0c80b766adceb058e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5e505ae02fb5ba1859c70c5fec7ab5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/29/7638fe8e-628a-4aea-9ef0-f84193037d49.png?resizew=164)
您最近一年使用:0次
2023-04-28更新
|
984次组卷
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4卷引用:华大新高考联盟2023届高三下学期4月教学质量测评数学试题(新教材卷)
华大新高考联盟2023届高三下学期4月教学质量测评数学试题(新教材卷)(已下线)华大新高考联盟2023届高三4月教学质量测评理科数学试题华大新高考联盟2023届高三下学期4月教学质量测评文科数学试题(老教材卷)河南省许昌市鄢陵县第一高级中学2023届高三下学期高考全真模拟押题数学(文)试题
2 . 在棱长为2的正方体
中,已知点P为棱
的中点,点Q为棱CD上一动点,底面正方形ABCD内的点M始终在平面
上,则由所有满足条件的点M构成的区域的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a019240236421a56d33ed143b476154.png)
您最近一年使用:0次
3 . 已知平面α,β,直线
.给出下列命题:
① 若
,
,则
;
② 若
,
,则
;
③ 若
,则
;
④ 若
,
,则
.
其中是真命题的是_________ .(填写所有真命题的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
① 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34512482dc6ca8f32d80e4b37d64086b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6328a5e1a42e99c8f30749b99bf2725.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de666db0febae223cc4d1dc189d71ca6.png)
② 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de666db0febae223cc4d1dc189d71ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5397292543f91f0e0d37a72f1b53c79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0258342fb0eff42b5d37cbe42b6c89b.png)
③ 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3264ffd2699e4e49b5732c47082dfb6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
④ 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4285fe5b27731c6f503dd4d8fdd70746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
其中是真命题的是
您最近一年使用:0次
2016-12-03更新
|
1340次组卷
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4卷引用:2015届江苏省南京市、盐城市高三第二次模拟考试数学试卷