试题与答案

科技创新是实现中 * * 伟大复兴的强大驱动力。阅读材料，回答问题。材料一　表3为200

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题型：问答题

题目：

科技创新是实现中 * * 伟大复兴的强大驱动力。阅读材料，回答问题。

材料一　表3为2008—2012年我国研究与试验发展（Ｒ＆Ｄ）经费支出与经济发展情况。注：Ｒ＆Ｄ经费支出占ＧＤＰ比重是目前国际通用的衡量科技活动规模、科技投入水平和科技创新能力高低的重要指标。目前，发达国家和地区该指标平均水平为3%。

材料二　近年来，为推进科技创新，国家采取了一系列措施；不断加大财政科技投入力度；完善国家科技奖励制度，健全与岗位职责、工作业绩、实际贡献紧密联系和鼓励创新创造的分配激励机制；加快构建以企业为主体、市场为导　、产学研相结合的技术创新体系。 材料三　科技发展丰富了公民的政治生活，政府网站、政务微博拉近了公民与政府的距离，使表达和倾听更加贴近；科技发展振奋了国人的精神，航母入列，“神九”飞天、“蛟龙”入海……我们在世界民族之林中更加自信。

材料一反映了哪些经济信息？

答案：

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考点：普通高考文科综合高考文综真题（山东卷）2013年
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设A是单位圆x2+y2=1上的任意一点，i是过点A与x轴垂直的直线，D是直线i与x轴的交点，点M在直线l上，且满足|DM|=m|DA|（m＞0，且m≠1），当点A在圆上运动时，记点M的轨迹为曲线C。

（1）求曲线C的方程，判断曲线C为何种圆锥曲线，并求焦点坐标；

（2）过原点且斜率为k的直线交曲线C于P、Q两点，其中P在第一象限，它在y轴上的射影为点N，直线QN交曲线C于另一点H，是否存在m，使得对任意的k＞0，都有PQ⊥PH？若存在，求m的值；若不存在，请说明理由。
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