已知正方体
的棱长为2,点
是棱
的中点,点
在四边形
内(包括边界)运动,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/7/15/2764854067503104/2770324436402176/STEM/e9f5ffd2365a4d8295fe4ab333ed871c.png?resizew=220)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://img.xkw.com/dksih/QBM/2021/7/15/2764854067503104/2770324436402176/STEM/e9f5ffd2365a4d8295fe4ab333ed871c.png?resizew=220)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
20-21高一下·黑龙江哈尔滨·期末 查看更多[3]
黑龙江省哈尔滨师范大学附属中学2020-2021学年高一下学期期末考试数学试题(已下线)专题卷01 空间向量与立体几何— 章节重难点突破卷-【重难点突破】2021-2022学年高二数学上册常考题专练(人教A版2019选择性必修第一册)广东省深圳市龙华中学2021-2022学年高二上学期第一阶段检测数学试题
更新时间:2021-07-24 14:12:17
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【推荐1】如图,正方形
的边长为1,E,F分别是
,
的中点,
交EF于点D,现沿SE,SF及EF把这个正方形折成一个四面体,使
,
,
三点重合,重合后的点记为G,则在四面体
中必有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/a4318a90-b7c4-47c8-bf20-19271899d88e.png?resizew=152)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ac787c642466044d50f89d5dac41da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af9a10717d214e599ee121de74bf451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7a689d8c7a11bc48ef98d9415c1968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ea2cb3843608a02c79e1d53285e975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fda993d38532293724009685288b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a12119eba9da5c32568de5832ff04c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccde9ef0f2e9d12524e3f67fec439654.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/a4318a90-b7c4-47c8-bf20-19271899d88e.png?resizew=152)
A.![]() |
B.设线段SF的中点为H,则![]() |
C.四面体![]() ![]() |
D.四面体![]() ![]() |
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【推荐2】如图,在三棱柱
中,已知点
分别在
上,且
经过
的重心,点
分别是
的中点,且
四点共面,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0f067a2a348ceb24a408f82992eab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4fb1884afa6b9d2625b489d6a0b4667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ea060a38d34288db2b99ab280acd6e.png)
A.![]() |
B.![]() ![]() |
C.![]() |
D.棱柱被平面![]() ![]() ![]() ![]() |
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【推荐1】如图
中,
是棱
上的动点(不含端点),点
在侧面
上运动,且满足
平面
,则下列命题正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/e85c8b47-e38a-4f7c-9921-a0a873b238c2.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d45c10c00742e89d4123977720c0e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2331bccb6ebf5b9fd639df994f575a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/e85c8b47-e38a-4f7c-9921-a0a873b238c2.png?resizew=158)
A.侧面![]() ![]() ![]() |
B.直线![]() ![]() ![]() |
C.当点![]() ![]() |
D.设正方体的棱长为1,当![]() ![]() ![]() ![]() ![]() |
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【推荐2】在长方体
中,底面
是边长为4的正方形,
,则( )
![](https://img.xkw.com/dksih/QBM/2020/7/13/2505229679484928/2505983152898048/STEM/f4a61c6fdd8b432280dba9be550f378d.png?resizew=189)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://img.xkw.com/dksih/QBM/2020/7/13/2505229679484928/2505983152898048/STEM/f4a61c6fdd8b432280dba9be550f378d.png?resizew=189)
A.异面直线![]() ![]() ![]() |
B.异面直线![]() ![]() ![]() |
C.![]() ![]() |
D.点![]() ![]() ![]() |
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【推荐1】在长方体
中,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b309cbd4cb06b07440868fff7d3870f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
A.直线![]() ![]() ![]() |
B.直线![]() ![]() ![]() |
C.直线![]() ![]() ![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
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【推荐2】如图,在长方体
中,
,
,
,下列说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/c12172f3-9398-4f75-a4de-8b09d439c2c4.png?resizew=141)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1192b3111a6dad01bba5227472bb4072.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/c12172f3-9398-4f75-a4de-8b09d439c2c4.png?resizew=141)
A.直线![]() ![]() |
B.平面![]() ![]() |
C.异面直线![]() ![]() ![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次