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src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4fbb38a85c5de379a3a322b2a2e612ed.png\">,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F555d9a96a86a2888189bbf2e1a8275ec.png\">()",[21,32,41,50,59,62,71,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],160322038,[25,26,27,28],"4","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F139bf4ef972f36702bfbf5b9b58342be.png\">","2","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2cddaa83e32a9c17971ec07988a2ac6c.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6d208c23fe390d78c152601a3f97a92f.png\">=( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],160322042,[36,37,38,39],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb9febc74c112d3724a163c7b9b968758.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffe586745dbe4ad22caaa820fb7677948.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb5b4c26fc923f2811714b0636d5a52a2.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fed09b1093c49da4bc23ee4f044273bad.png\">","如图,AB是斜靠在墙上的长梯,AB与地面夹角为α,当梯顶A下滑1m到A′时,梯脚B滑到B′,A'B'与地面的夹角为β,若tanα=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F779963ee1d4208bf525de459c2c9a807.png\">,BB'=1m,则cosβ=( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcf2f2505d7620a01cc951d9f7228252f.png\">",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],160322043,[45,46,47,48],"6.4","8.1","9.2","7.5","如图,在△ABC中,AB=AC=10,点D是边BC上一动点(不与B、C重合),∠ADE=∠B=α,DE交AC于点E,且cosα=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb5b4c26fc923f2811714b0636d5a52a2.png\">,则线段CE的最大值为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6f97810d515b05b17a93590f98922f8f.png\">",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],160322044,[54,55,56,57],"a>1,b>0","0<a<1,b>0","a>1,b<0","0<a<1,b<0","函数f(x)=ax-b的图象如图所示,其中a,b为常数,则下列结论正确的是( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbc46b15ec53957cd2fc17dc84d1011e1.jpg\">",{"answer":60,"createTime":5,"id":6,"options":61,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],160322046,[66,67,68,69],"3\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","3","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4c56e53c0f85b6a165f9c3385013fe1e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","如图,在△ABC中,BD⊥AC,AB=6,AC=5\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">,∠A=30°.则BD的长为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff35eb8199fac95e1bc391095b0af2cdd.png\">",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],160322047,[75,76,77,78],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F09ad9a8a80c88a3903b26378aa4ae609.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd0ce64ae8f4353eb4ec7c8658333579a.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb24b48bed4b7132d119bce6887a80eec.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F393d5fb6c6754179dfedf12a0715b639.png\">","若角α是第二象限的角,且\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffa8137e9f50abc4a2603265a7a975f6b.png\">,则cosα的值为( )",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],160322048,[84,85,86,87],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2a6ed9b4126a4ad52b5721229ab801fd.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbbdc9bb3d9016c19b11c1d88e44eaf25.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F154cbb52818e2a519e4ece9c41171b4a.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F07099c9f957dd4aa697186b27be9c10f.png\">","算式\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff198547e6b8dd37bf9f8e6501cd06b88.png\">的值为( )",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],160322049,[93,94,95,96],"2\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbebcafea07236ae724b04fd444b8dda7.png\">","2\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8794384c7480dd3ef0955f90a9b9bfd.png\">","2\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc8076653438d0ed96b356a393b75dae7.png\">","2\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F50d39017aab69f2d13ef25a8829bafc0.png\">","如图,在四边形ABCD中,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6c92f40f4486009f45a9310014411c7c.png\">,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1c8ebdc9a697d8ff3ad605bda57f4a85.png\">,AB=4,AD=5.则AC的长为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdaa00f335a0aba768831ea326b74f789.png\">",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],160322050,[102,103,104,105],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0dc8989a0582bfcce04dff4db4428f64.png\">","-\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0dc8989a0582bfcce04dff4db4428f64.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0bc2fa294b1dffeeb3e7aab5ba0537f2.png\">","-\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0bc2fa294b1dffeeb3e7aab5ba0537f2.png\">","已知\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4048d1ad368efb946214e36f121943e0.png\">且α是第四象限角,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F787c4685869355569d71afa990e8637b.png\">的值为( )"]