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题型:解答题 难度系数:0.65 引用次数:586 更新时间:2019/06/25 05:59:54 题号:8279676
类题推荐
【推荐1】如图,在几何体eqId2588751f06594e188fec5312191ec3a6中,eqId99a3187c2b8f4bcc9703c74c3b72f1f3eqId1a0830891ff846de8422ea80714ecab4均与底面eqId5313362e4d2a4623b61b67efc0f56b7c垂直,且eqId5313362e4d2a4623b61b67efc0f56b7c为直角梯形,eqId7d1d9818fd0b4955b9294700f66485aceqIddf39ca4e35a7467aa4021aa114992719eqIdbd7de54fc37e4c27a8c63fe773b65edbeqId92869ac114124367b45f631d030ed6bdeqId4c12bb4f299b40d2aaf895c0f6dd599a分别为线段eqId34c6b6e427744abfb88dc90b8c7c2111eqId0627be51821d4be7b3e024a354815d64的中点,eqId7412be7a456647e695421020b620936e为线段eqId66d409c343f04cfda647f9bfc7da6b2a上任意一点.
figure
(1)证明:eqId0c5e0f898b4a468abd6c3a3362ed7747平面eqId2f45e682cb554a7abe855a10d135f11f.
(2)若eqId174e2251018e46fd9d8d954058932a37,证明:平面eqId46c947d666f7465b86fe6ae2fe165797平面eqId709141c537664787b18fdbf3236dc7e6.
难度系数:0.65使用:144次题型:解答题更新:2019/10/28
【推荐2】如图,eqId99a3187c2b8f4bcc9703c74c3b72f1f3为圆eqId2efda802d5534f6d92d9f8af7aaec28b的直径,点eqId93cbffaa5ae045d6ac45d1e979991c3aeqIdd5b10b2a13f148b78e0d5a1b820538fd在圆eqId2efda802d5534f6d92d9f8af7aaec28b上,eqId6b53a40c5633437d9802e447cd682751,矩形eqId5ce7a06ae7a34393b92b5277978ac014和圆eqId2efda802d5534f6d92d9f8af7aaec28b所在的平面互相垂直,已知eqIdb60bb1649c8b41cb935771acc097167eeqId298ed72d15fc4335ba1231e539617d48.
figure
(1)求证:平面eqIdbeb9814b605b43d4b321764cef4af533平面eqIdeb5dd9e32ac6429792696965a1a1e349
(2)当eqIdded28dbc6ca54681ab966fe6545c6cdc时,求多面体eqId098d950fee3448a6893d973363abae27的体积.
难度系数:0.65使用:107次题型:解答题更新:2019/10/26
【推荐3】如图,在三棱锥eqIda05cf829680e460f9f2ab31071f44695中,eqIdd5ec86ad27bf40b6ac900ae23882d0dfeqId0cd8063abf2b458f80091bc51b75a904在底面eqId89fbdcb029be4482b52165366491c70f上的射影eqId93cbffaa5ae045d6ac45d1e979991c3aeqIdcf2da96900c948a1b3ce7cbfd420c080上,eqId9ec785aa26ea42d2ad011934f3d1775feqIdd5b10b2a13f148b78e0d5a1b820538fd.
figure
(1)求证:eqId0627be51821d4be7b3e024a354815d64平行平面eqIda3eb5356d699417e8d2a360a77f14a6b,平面eqId18a577563192420c8bc0a14ded22342c平面eqIda3eb5356d699417e8d2a360a77f14a6b
(2)若eqId9294fb4a64fa40cf9e7be69735d4b8c8,求直线eqId1dcb20a9ce8d4076af5dd64f7066c6d6与平面eqIda09bc2b44bac4987864b05e1e0de0283所成角的正弦值.
难度系数:0.65使用:251次题型:解答题更新:2019/10/19
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