课时跟踪检测(六十六) 几何概型一选择题1.(2015·广东七校联考)如图矩形长为6宽为4在矩形内随机地撒300颗黄豆数得落在椭圆外的黄豆数为96以此实验数据为依据可以估计出椭圆的面积约为( )A. B. C. D..在满足不等式组eq blc{rc (avs4alco1(x-y1≥0xy-3≤0y≥0))的平面点集中随机取一点M(x0y0)设事件A为y0<2x0那
课时跟踪检测(六十) 几何概型普通高中重点高中共用作业(高考难度一般无须挖潜)A级——基础小题练熟练快1.在长为2的线段AB上任意取一点C则以线段AC为半径的圆的面积小于π的概率为( )A.eq f(14) B.eq f(12)C.eq f(34) D.eq f(π4)解析:选B 设ACx因为以AC为半径的圆的面积小于π故πx2<π所以0<x<1
课时跟踪检测(六十) 古 典 概 型1.(2012·惠州调研)一个袋中装有2个红球和2个白球现从袋中取出1个球然后放回袋中再取出1个球则取出的2个球同色的概率为( )A.eq f(12) B.eq f(13) C.eq f(14) D.eq f(25)2.(2012·鸡西模拟)在40根纤维中有12根的长度超过3
课时跟踪检测(四十六) Which EnglishⅠ.单项填空 1.—I forgot to bring my pen for the lecture. —________. I have got a spare one. A.Go ahead B.Youre wee C.Not to worry D.Dont mention it2.I know its time I
课时跟踪检测(四十六) Which EnglishⅠ.单项填空 1.—I forgot to bring my pen for the lecture. —________. I have got a spare one. A.Go ahead B.Youre wee C.Not to worry D.Dont mention it2.I know its time I
课时跟踪检测(三十六) War and PeaceⅠ.单项填空1.(2014·泰安市模拟)________ his great wealth he always remains a man of simple .Except B.DespiteC.Although D.Besides2.Why are you still working on this project Its 4
课时跟踪检测(三十六) 细胞工程一选择题1.(2015·西城区调研)下列技术或方法与原理不相符的是( )A.紫草细胞培养和杂交瘤细胞的培养——细胞增殖B.植物组织培养和制备单克隆抗体——细胞的全能性C.原生质体融合和动物细胞融合——细胞膜的流动性D.纤维素酶果胶酶处理植物细胞壁——酶的专一性2.下列叙述中肯定没有采用植物组织培养技术的一项是( )A.花药离体培养得到单倍体植株B.细胞工程培育番
课时跟踪检测(六) The Internet and TelmunicationsⅠ.单项填空1.—Do you think I should accept his invitation Jim—________ If I were you I certainly .None of your business. B.It .Why not D.I dont think .Some ad
课时跟踪检测(六) The Internet and TelmunicationsⅠ.单项填空1.(2014·成都成飞中学诊断)—Do you think I should accept his invitation Jim—________ If I were you I certainly .None of your business. B.It .Why not D.I dont
课时跟踪检测(十二) Making JourneysⅠ.单项填空1.(2014·南开中学模拟)—I found the mark rather frightening.—________ It frightened me to death just .Thats reasonable advice. B.Isnt it a good ideaC.Do you think so D.I c
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