重庆中考数学最后一道填空题题目是？

重庆中考数学最后一道填空题题目是？

重庆市西南师大附中2007—2008学年度上学期期末考试高二数学试题参考答案（理科） 一、选择题：本大题共10小题，每小题5分，共50分．在每小题给出的四个备选项中，只有一项是符合题目要求的．1．C 2．B 3．D 4．C 5．B 6．A 7．C 8．B 9．A 10．A二、填空题：本大题共6小题，每小题4分，共24分．11． 12． 13． 14．2 15．7 16． 三、解答题：本大题共6小题，共76分．17．解：(1) 设双曲线C的方程为 椭圆 ∴ ∵ ∴ a = 2∴ ∴ 所求双曲线方程为 ······························································ 6分(2) 由已知得 ∴ ∴ ·································································· 12分 18．解：(1) 由已知C（3，3），r = 2 ············································································· 2分 ∵ l与⊙C相交，故 ··························································· 4分 ∴ ···························································································· 6分(2) ∵ l与⊙C相交于A、B，且 | AB | = 2，r = 2 故 ················································· 8分 ················································································ 10分 ∴ 所求l： ········································································· 12分19．解：(1) ∵ E、F分别是CD、BD的中点 ∴ EF∥BC·································································································· 2分（19题图）ABCDEFHG∵ 平面ABC， 平面ABC∴ EF∥平面ABC····································· 5分(2) 分别取AC、BC的中点G、H，连结GH、GF、EG、FH∵ F、H分别为BD、BC中点∴ FH∥DC， ···················· 6分又G、H分别为AC、BC中点∴ GH∥AB， ················ 7分∵ DC⊥AB，∴ FH⊥GH在Rt△FGH中， ···················································· 8分∵ EG∥AD，EF∥BC∴ ∠GEF就是异面直线AD与BC所成的角（或其补角）·························· 10分∵ AD = 10，BC = 6 ∴ EG = AD = 5，EF = BC = 3在△EFG中， ∴ ∠GEF = 60°即异面直线AD与BC所成的角为60°····························· 12分 20．解：设直线l的方程为 ············

已知：如图，在正方形ABCD外取一点E，连接AE，BE，DE。过点A作AE的垂线交ED于点P。若AE=AP=1，PB=根号5。下列结论：（1）三角形APD全等于三角形AED；（2）点B到直线的距离为根号2；（3）EB垂直于ED（4）S三角形APD+S三角形APB=1+根号6；（5）S正方形ABCD=4+根号6。其中正确结论的序号是（ ）A.134 B.125 C.345 D.135