美学与人生2015大作业

已知动点p 到定点F (√2.0)的距离与p 到直线l ：x ＝2√2的距离比为√2／2.球动点P 的轨迹C 的方程 如何肉眼鉴别玉器? 已知动点P到定点A(0,1)的距离比它到定直线y=-2的距离小1.1、 求动点P的轨迹C的方程；1、 已知点Q为直线y=-1上的动点,过点Q作曲线C的两条切线,切点分别为M,N,求证：M,Q,N三点的横坐标成等差数列 请问如何用肉眼辨别玉的真假? 已知动点P（x,y）到定点F（1,0）的距离比它到定直线x=-2的距离小1.（1）求点P的轨迹C的方程；（2）在轨迹C上是否存在两点M、N,使这两点关于直线l：y=kx+3对称,若存在,试求出k的取值范围；若 他们小组几乎所有人都参与了那次争论.(get involved in) 已知动点p到定点A(0.1)的距离比到直线Y=-2的距离小1求动点p的轨迹c的方程? 中翻英：他们小组的所有人都参与了那次争论.(get involved in) 一定要说明理由 1.How are comic strips produced?The article will probably be about that.(合并为宾语从句）2.People have destroyed more than half of all the trees on the earth in the late 200 year.(该被动语态）3.I want to buy a new 一定要说明理由 1.How ____ the little girl with long hair looks!A.quietly B.lovely C.beautifully D.wonderfully2.Don't forget to send me an E-mail when you _____the city of london.A.reach B.get C.arrive D.enter3.An ________ woman won the tennis 1._______ a wave of frustration,she felt at a loss as to how to respond to his angry words.A.Overcoming with B.Overcame by C.In order to overcome D.Overcome with2.The best job is ______ which uses your skill in doing something together with your inte 菱形的一条对角线与它的边相等,则他的锐角等于___° 已知菱形两条对角线长的乘积恰好等于它的一条边的根号3倍,若菱形的边长为1,则菱形的一个锐角的度数为? I always get stuck in rush hour traffic 不能用get involved in?.I always get stuck in rush hour traffic我觉得参与了堵车也行啊 肉眼怎么鉴别玉的好与坏? 二道英语题目 要说明理由 谢谢1.We should put the rubbish in the litter bin.(改为一般疑问句） ________ you _______ put the rubbish in the litter bin?2.Pansy was elected to be secretary of the class newspaper.（保持句意基本 一定要说明理由 1.People are planting more and more trees every year.(改为被动语态）More and more trees are _____ _____ every year.2.You have found out using the sun to give power to calculators.(改为反意疑问句）You have found ou 求到定点F（c,0)与到定直线l:x=a^2/c距离之比是c/a(c/a>1)的点M的轨迹 一定要说明理由 1.You should wash your hands before dinner.(保持原意不变）You'd _____ _____ have dinner with your dirty hands.2.The travel agent said that they would provide hotel for us.(保持愿意不变）The travel agent said that t 一定要说明理由 1.Neither that magazine nor this book _____ to be taken out of the library.A.are allowed B.is allowed C.allowed D.allows2.If you don't work hard,you will fall behind _____ students.A.others B.the others C.another D.the other3.Th 找高中必修一政治复习大纲 谁有高中必修一至必修四的政治复习提纲 高中必修三政治复习重点 高中必修4的政治复习提纲 曲线y=sin²x+6在x=兀/4处的切线的倾斜角是 y=sin²x的周期怎么求? More new _____ will be opened up in the future for those with a university education.A.opportunitB.necessities C.realities D.probabilities z=z(x,y)是方程z+lnz-∫(x,y)e^(-t²)dt=0确定的,求d²z/dxdy 英语翻译The first spills in early 1922 (Fig.4) began to erode thefoundation at the downstream toe.Subsequently,an apron wasadded and the spillway training walls were improved.Thesemeasures reduced the hazard.Finally,in 1959 a thorough hydraulicst 求山东高中政治复习提纲, 学水利水电和英语能力有关吗 英语翻译The foundation,including abutments.should be of rock or consolidated materials sufficiently strong to support the structure an they must be watertight or so nearly so that excess leakage can be prevented by sealing any cracks or fissures