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【推荐1】已知eqId992fe44057cf4492895193f3f5398449是边长为1的等边三角形,点eqId0cd8063abf2b458f80091bc51b75a904eqId93cbffaa5ae045d6ac45d1e979991c3a分别是边eqId99a3187c2b8f4bcc9703c74c3b72f1f3eqIde84e0278d905475dbdfd36c2a4101592的中点,连接eqId00e790eab5b04650b6399818cf3cf618并延长到点eqIdd5b10b2a13f148b78e0d5a1b820538fd,使得eqId24856db5685d4b8996384c6f2f8c9f13,则eqId382f366d0bc14c88b1a11d532043d726的值为(  )
A.eqIda50946aeb7884a5dad4d0218066a4402B.eqId59ed9a80e0cf4f11aae67ef6df0a3efeC.eqIde41289c7307b48bd893a195b321d250fD.eqId1d0be865b86d4e258df7636f501a12d7
难度系数:0.65使用:153次题型:单选题更新:2019/6/17
【推荐2】已知非零向量eqId65157f86b1c2448bb6cb33e02d118af8,eqIdb368d61ee9914632a3a232f3628534da的夹角为eqIdb4b5468ef66640e890efc57540f9453b,且满足eqId71a578bdb3dd4d8ab1f4da84fbfe9bd4,则eqIdc1e910d329f74862be392ed6bd8fdf59的最大值为(  )
A.eqIddb6b28cbd8a14caa9cf1146f6f7916c0B.eqIdf1bd69290a464f71ac73b93c51985105C.eqIdc052ddfbd4524f67a79e0e77c2e5656aD.eqId8898c1dc81824f3098bbeae74e8f11fd
难度系数:0.85使用:109次题型:单选题更新:2019/6/8
【推荐3】已知eqId992fe44057cf4492895193f3f5398449eqIddc83d4d478e640cab6df71ab2a14ae7eeqId5f9c96c0eec34b4a9cc0f1c9cf6ff7fdeqId8eea7f6267fb49d9bce12b8ba079a43e是边eqIde84e0278d905475dbdfd36c2a4101592上的点,且eqId0725ab95a5eb4448981602dd09e362bbeqIdaad7b72a25924d078d2360cdc99f1090eqId992fe44057cf4492895193f3f5398449的外心,eqId2264f2e9311b42dc9f28d9d322a24413的值为(   )
A.8B.10C.18D.9
难度系数:0.65使用:145次题型:单选题更新:2019/6/11
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