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定义域怎么推导出来的,谢谢了 is,it,talk,him,with,pleasure,a,grest,to 什么是误差界限（margin of error）?他和置信区间的大小有什么关系?例如一个95%的置信水平和99%的置信水平的关系是什么?答案是99%的误差界限更大因为他需要构建一个更宽的置信区间 求f(x)=lg(x-ka)+lg(x^2-a^2)定义域这就是全部题目啊 The latest Reuters-Zogby poll shows McCain beating Obama by a margin of 46 to 40 percent为什么要用beating 而不用beat呢 show后面跟的宾语从句 mccain是从句的主语 后面如果跟V+ING的话 也应该是 mccain is beating啊 还是s 高中数学 各角的定义域大家来复习一下顺便帮我整理一下吧 比如说异面直线的夹角定义域 倾斜角的定义域 两直线夹角的定义域 二面角的定义域等等.帮忙列一下吧 x+1>0的定义域 高中数学求定义域详细,谢了 英语翻译 It's my pleasure和With pleasure有什么区别?怎么用?哪个是谢谢的意思 with pleasure 和my pleasure 区别 my pleasur,It's a pleasure,with pleasure,It's my pleasure 有什么区别?分别在什么时候用? In some parts of our country,f___is easyIn some parts of our country ,f__ is easy.But i__difficult in the northwest. The soil there is p______ forming,and bushes grow here and there .Anyone who wants to farm there h__to work evry hard.The first job i The payment for your visa application has been declined. our school looks very beautiful一般疑问句 he went to visit the art museum 句中went后面用加s吗 They went to Shanghai to visit the w什么 Expo in 2010 A group of______will visit the museum tomorrow.A.HungarianB.AustralianC.JapaneseD.American 准备去英国求boy london在伦敦的实体店具体地址 求英国最大boy London的详细地址（在伦敦的） 已知椭圆的焦距是2 且焦距是椭圆上一点P到两焦点距离的等差中项求椭圆方程 这是什么啊,淘宝猜图的,没法上图只好描述了,一个圈圈用用铁丝推着玩的,是什么游戏啊? If you could have chosen where you were born,what culture would have been your choice.这句话不是过去虚拟语气的If +had done啊,怎么解释呢 中学生how would your life be different if you were to live in a foreign country.急求一篇小短文 How would you get rid of your stress in daily life?求情景对话时间是2分钟 2009年的全国初中数学联赛答案是什么啊?急. Our school is big and beautiful.It has a big garden.合为一句初一下册英语典中点Unit 2 Section B turned out to bid a final farewell完整的句子是：senior chinese leader on sunday turned out to did afinal farewell to xiao ke.其中的turned out thankyou and answer everyone!什么跟什么啊？不是 最终和结果的意思吧！ All my life,never trust men say I'll love you forever this sentence.Bid farewell to a person,toAll my life,never trust men say I'll love you forever this sentence。Bid farewell to a person,to start a new life.That I would be good.Please believe me. 对数函数Y=logaX,它的值域为什么是全体实数,定义域为什么是（0,正无穷）? 求使函数y=X2+aX-2/X2-X+1的值域为（负无穷,2）的实数a的取值范围.过程中为什么判别式小于0呀∵函数y=(x²+ax-2)/(x²-x+1)值域为(-∞,2) ∴(x²+ax-2)/(x²-x+1)0 ∴(1)去分母整理变为：x²-(2 2009年全国初中数学联赛（复赛）答案（初三的）四月五号上午的那场,广东省的.