#
#
#
#
8-7圆锥曲线的综合问题(理)闯关密练特训1.(2012·潍坊教学质量监测)椭圆eq f(x24)eq f(y23)1的离心率为e点(1e)是圆x2y2-4x-4y40的一条弦的中点则此弦所在直线的方程是( )A.3x2y-40 B.4x6y-70C.3x-2y-20 D.4x-6y-10[答案] B[解析] 依题意得eeq f(12)圆心坐标为(22)圆心(22)与点(1
第10章 第二节高考数学总复习人教B版第10章 第二节高考数学总复习人教B版 第 二 节用样本估计总体 频率分布直方图 答案:A 答案:C 答案:600 茎叶图 答案:B 答案:B 样本平均数与样本方差 答案:D 答案:B 答案:2
#
单项填空从ABCD四个选项中选出可以填入空白处的最佳选项并在答题卡上将该项涂黑1. Why dont you go for ___ walk Itll give you ___ appetite for your lunch.A. a B. a an C. an D. 2. ---What attracts people to California is its pleas
单项填空从ABCD四个选项中选出可以填入空白处的最佳选项并在答题卡上将该项涂黑1. —What have you been busy with these days —I ______ that the speech contest has been brought forward so I ______ for it.A. was informed have been preparing
单项填空从ABCD四个选项中选出可以填入空白处的最佳选项并在答题卡上将该项涂黑1.Jeniffer is worthy ________ smoking as she suffered a lot from lung problem.A. to cut out B. cutting out C. to be cut out D. of being cut out2.
违法有害信息,请在下方选择原因提交举报