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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
1.(文)(2012·江西理6)观察下列各式:ab1a2b23a3b34a4b47a5b511…则a10b10( )A.28 B.76C.123 D.199[答案] C[解析] 本题考查了归纳推理能力∵134347471171118111829…4776123故选C.[点评] 解答本题时可能因为分析不出右边数字与前两式的数字关系从而无从下手导致无法解题或错选要注意训练观
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.
2014高考物理分项解析闯关密训:课时总复习181.在静电场中将电子从A点移到B点电场力做了正功则( )A.电场强度的方向一定是由A点指向B点B.电场强度的方向一定是由B点指向A点C.电子在A点的电势能一定比在B点的高D.A点的电势一定比B点的高2.(2013·浙江五校联考)如图所示空间中的MN处存在两个被固定的等量同种正点电荷在它们的连线上有ABC三点已知MNBMA<NA.现有一正点电荷
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