9-10高三·吉林长春·阶段练习
名校
解题方法
1 . 如图,在正方体
中,
、
分别是
、
中点
![](https://img.xkw.com/dksih/QBM/2010/5/8/1569722033496064/1569722038788096/STEM/c56f2131c0aa48a1acc6f372fce3ce01.png?resizew=176)
(1)求证:
;
(2)求证:
;
(3)棱
上是否存在点
,使
平面
,若存在,确 定点
位置;若不存在,说明理由.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://img.xkw.com/dksih/QBM/2010/5/8/1569722033496064/1569722038788096/STEM/c56f2131c0aa48a1acc6f372fce3ce01.png?resizew=176)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b84b8ea41aab9c5b688308ac9350fdd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e22ba3e6e1c1d6b12d9b8baa8d1f02.png)
(3)棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb8697622fb9d281cf44feb4adaf14a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2 . 图2中实线围成的部分是长方体(图1)的平面展开图,其中四边形ABCD是边长为1的正方形.若向虚线围成的矩形内任意抛掷一质点,它落在长方体的平面展开图内的概率是
,则此长方体的体积是_______________ .
![](https://img.xkw.com/dksih/QBM/2010/4/23/1569702465716224/1569702470901760/STEM/325acae1-0c36-4bab-bed4-1a670e9041b1.png)
![](https://img.xkw.com/dksih/QBM/2010/9/30/1569847306174464/1569847311294464/STEM/b59c187202124c84b09613a7b98d30a1.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2010/4/23/1569702465716224/1569702470901760/STEM/325acae1-0c36-4bab-bed4-1a670e9041b1.png)
![](https://img.xkw.com/dksih/QBM/2010/4/23/1569702465716224/1569702470901760/STEM/a283d26b-9382-4140-a091-3035445d88a0.png?resizew=274)
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2016-11-30更新
|
1054次组卷
|
6卷引用:正定中学2010高三下学期第一次考试(数学文)
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9-10高三下·黑龙江·阶段练习
解题方法
3 . 一个几何体的三视图如图所示:其中,主视图中大三角形的边长是2的正三角形,俯视图为正六边形,那么该几何体的体积为 .
![](https://img.xkw.com/dksih/QBM/2011/2/17/1577384037326848/1577384038760448/STEM/2ee3a613880c419586a85452cf826fd1.png?resizew=458)
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9-10高三·吉林长春·阶段练习
4 . 已知
,
为不同直线,
,
为不同平面,则下列选项:①
,
;②
,
;③
;④
,其中能使
成立的充分条件有
![](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/b3d1a34ae2b8c77f8d7e355c6d1d667e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c62c14a017007a6bdfe25eada9c433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a93a52c2b943e4c70ace99ed802d2b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b30e6b1e49880fa910e76bc8a9274b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6873c9be501834aedb701f9d08685384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59125d06d7a90bf51db555a988025c34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5d3033e1e0a17513353e88d2389864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b859d55b6f80e41dff6ef449777da57d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d86b6df229c2d41afe5d7ff2a46897f.png)
A.①② | B.①③ | C.①④ | D.③④ |
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9-10高三下·黑龙江·阶段练习
5 . 设
、
是两个不同的平面,
、
是两条不同的直线,给出下列4个命题,其中正确命题是( )
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.若![]() ![]() ![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
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