一、单选题(共5小题)
A.椭圆 | B.圆 | C.三角形 | D.矩形 |
【知识点】 圆锥中截面的有关计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2020/12/11/2611897931399168/2613941717598208/STEM/a96aff7b3a994ded8d23aceb0fe0c6c6.png?resizew=227)
A.![]() | B.![]() |
C.![]() | D.![]() |
【知识点】 求异面直线所成的角
![](https://img.xkw.com/dksih/QBM/2018/6/26/1975741960478721/1977980573040640/STEM/bd86eb82-2fa4-4321-985e-d887b17b5207.png)
A.1个 | B.2个 | C.3个 | D.4个 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d9ef979b9f27a28cbda6923e888ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2020/11/12/2591408125321216/2591840466354176/STEM/b525f96d101a4cd9a4c3f762bc217f36.png?resizew=132)
A.面![]() ![]() | B.面![]() ![]() | C.![]() | D.![]() |
【知识点】 面面平行证明线面平行 证明面面垂直
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef41687d77ac02ef71b6f245d881ca25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f1a449b9325324c3549ebfe110b745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666734423f1818d76a74f171b7420b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6160d4e567a1bfd3a6ee159067453579.png)
A.①和②都不成立 | B.①成立,但②不成立 |
C.①不成立,但②成立 | D.①和②都成立 |
【知识点】 线面垂直证明线线垂直 线面平行的性质
二、填空题(共5小题)
【知识点】 求异面直线所成的角
![](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/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://img.xkw.com/dksih/QBM/2020/12/22/2619491208019968/2620623945981952/STEM/a10cb7b006af45dba3302bb7f1caa74e.png?resizew=144)
【知识点】 求异面直线所成的角
![](https://img.xkw.com/dksih/QBM/2021/5/22/2726625018675200/2831567184306176/STEM/f42c6984-c3fe-4917-90cf-081e02ac0554.png?resizew=228)
【知识点】 判断线面平行
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd55753980a07b1314ee565f21c9d09.png)
![](https://img.xkw.com/dksih/QBM/2021/5/22/2726625018675200/2831567184330752/STEM/51a372b0-64e4-47e8-a980-05e7de421d78.png?resizew=224)
【知识点】 证明线面垂直 补全线面垂直的条件 线面垂直证明线线垂直
三、解答题(共5小题)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bd8c13192ca45c16dad5d59b547220.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/356ca8e7-1451-49ce-84c3-347f1a703094.png?resizew=120)
(1)求直三棱柱A1B1C1﹣ABC的体积;
(2)求异面直线BM与B1C1所成的角的大小.(结果用反三角表示)
![](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/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b642661c9bba7bcd74b071c2f2d54565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d10a3cb70901c040a383394f4d9038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669bf000351b4a5b48d7322ef8e720a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89fc107c4b33d6dd648b396156494ea9.png)
【知识点】 空间中的点(线)共面问题 空间中的点共线问题
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/7fe89fd8-1eb9-4e2f-8113-a652182c739c.png?resizew=171)
(1)证明:AE//平面BDC1;
(2)若异面直线BC1与AC所成角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e162b98c280720fcb909cf392fda3.png)
【知识点】 由异面直线所成的角求其他量 证明线面平行 线面角的向量求法
![](https://img.xkw.com/dksih/QBM/2020/7/23/2512341463425024/2512921636364288/STEM/d5f79b6e0ca445fc8c88658e1fde67ac.png?resizew=395)
(1)求证:OH∥平面BCD;
(2)求二面角A﹣BC﹣D的余弦值.