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过y^2=2px(x>0)上一点P(x0,y0)(y0>0)作两直线分别交抛物线于A(X1,Y1)B(X2,Y2)1)求抛物线上纵坐标为0.5p的点到其焦点F的距离2）当PA、PB斜率存在且倾斜角互补时求（y1+y2）/y0的值,并证明直线AB的斜率是 时钟的分针转动一周形成的图形是().从()到()任意一点的线段叫半径.通过()并且()都在()的线段叫做直径.填空. if函数,嵌入方程在execl中怎么写如果均分小于8分 是R；如果均分大于等于8分小于10分 或者均分大于等于10分但有一门小于5分 是T；如果均分大于等于10分且没有任何一门小于5分 是A (1)时钟的分针转动一周形成的图形是（ ）(2)从（ ）到（ ）任意一点的线段叫半径(3)通过（ ）并且（ ）都在（ ）的线段叫做直径(4)在同一个圆里,所有的半径（ ）,所有的（ ）也都相等,直 做英语四六的阅读,方法?如何提高阅读速度. 通大声读的方式用英语怎么说 哈哈,有看过猎人、狼、白菜,他们怎么过河. 在数轴上到表示5和-5的点距离之和等于10的点有无数个,其中表示整数的点的个数是有限的,请你想一想这样的整数点有几个? 数轴上到-3的距离等于2的整数是? 能被10整除的整数,一定能被5整除的等价命题 与“能被6整除的整数,一定能被2整除”真假性一致的命题是是填是它的逆命题还是否命题还是逆否命题，不是其它的 新概念英语四册里最难的句子哪句.还有,谁能在顺便总结一下所有的经典句型 初中历史资产阶级性质的革命和改革有哪些?各国的都要,尤其是中国的, 拉丁美洲独立运动得性质怎么判断 依据是甚么 拉丁美洲独立运动是否具有民主革命性质?为什么? 为什么说拉丁美洲独立运动带有早产性质?请具体说明. 只有两条对称轴的四边形急 英语10处改错每处限改一词 英语改错 10处每篇⑩I have gone to only a few foreign countries.Visiting those countries made me eager do even more traveling.There were so many countries that I would like to visit ,but present I would like to see Tahiti above all.I have seen 英语改错,（共10处）Xiao Ming fell sound asleep on sofa with the TV on,His mother couldn't help shout at him after reminding him for such many times.There were many reasons for environmental phenomenon .without the cultivation of good habits a 英语改错,共10处 In the past,people who lived far away have to write letters in order to keeping in touch.It wasn't convenient.Nowadays,people can keep in touch by calling,write emails,or using MSN.It seems that you will never lose in touch with 如何根据电动机的铭牌进行定子接线? 如果你有一匹狼.一只羊.一筐草,你面前有一条河,你要运几次?怎么运? 有个人,带着一只羊,一匹狼,一筐菜要过一座桥. 什么类型的电机,电机铭牌上不标示额定电流 一个高中集合的概念题哦试说明下列合集的含义：A={x/y=x²+2x-1,x∈R}B={y/y=x²+2x-1,x∈R}C={(x,y)/y=x²+2x-1,x∈R}D={s/s=t²+2t-1,t∈R}我觉得前2个和最后一个意义一样啊 英语改错 有10处the day when my life changed the better was the day when i had met killian,my dog.on entering apet shops,iwas soon attracted by this little dog,knowing as the king of dogs.i would usual lie down on the floor ang he would lie down 英语改错10处My aunt lives in a village far from my town.Last year she came to visit us,brought me a little dog for a birthday present.It was a little black dog with white spots.It was such lovely that I liked it at once.Every day after school I 这个喵星人是什么品种? 英文改错 10处You will never guess what I saw on this weekend.I saw a dog show.Dad and I was going to the park to fly a kite.When Dad and I walked up to the park,we saw dog everywhere.Big dogs,little dogs,old dogs,and young dogs were all run arou 他很聪明,知道如何多赚钱?把它翻译成英文/ 现在的空调都流行变频,有什么不一样?