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计算时错将两数相加算成相减,结果等于17.2,比正确少15.8,最好讲明为什么要怎样做? 关于三角函数线的一道题. at the century mark 已知BF、CE分别为三角形ABC中角B、角C的平分线,AM垂直CE于M,AN垂直BE于N,求证MN平行BC. by the mid-18th century 用什么时态 如图,在△ABC中,BE,CD分别为∠ABC和∠ACB的平分线,AN⊥BE于N,AM⊥CD于M.求证MN‖BC 抛物线y=ax^2+bx+c(a≠0)经过点(-1,0)(3,0)(0,-3) 概率题：6个黄球,4个白球,不放回的取两次,每次取一个球,求其中之一是黄球,另一个也是黄球的概率是多大家帮帮忙吧~~~在此先谢过了O(∩_∩)O~可是这个题目的答案是5/13 谢谢大家了O(∩_∩)O~ in the early twentieth century,the "Model T"authmobile was mass produced and sold at a price__could afford.a the average person who b that the aberage person whoc and the average person d the average person 问一个初三二次函数概念问题在线等我一直不能理解顶点式的这个问题 y=a(x-h)2 如：y=3(x-5)²不是等于3x²+75+7x）吗?这怎么左右移动啊?谢谢!在线等 初三二次函数的概念题一道,公式s=1/2at^2+10,当a为已知数,s是t的___函数,当t是已知数,s是a的___函数抱歉我的概念不是很清楚 定义新运算：a*b=最小公倍-最大公因 如：6*8=24-2=22 问：6*x=27 求x=? 已知集合A={－8,－6,－4,－2,0,1,3,5,7},在平面直角坐标系中,点（x,y）的坐标,求已知集合A={－8,－6,－4,－2,0,1,3,5,7},在平面直角坐标系中,点（x,y）的坐标,计算：（1）点（x,y）正好在第二象限的概 已知集合A={-7,-11,-3,-10,-5,0,2,7,9,13},在平面直角坐标系中点(x.y)的坐标满足x∈A,y∈A且x≠y,求（1）点（x,y）不在x轴上的概率；（2）点（x,y）正好在第二象限上的概率.（1）9/10；（2）2/9 已知A=2*3*3*5*7,B= 2*2*5*5*7 最大公因最小公倍 已知集合A=,﹛-3,-1,0,2,4﹜,在平面直角坐标系中,点（x,y）的坐标x∈A,y∈A且x≠y计算（1）点（x,y）不在x轴上的概率（2）点（x,y）在第二象限的概率 a=2*3*5,b=2*2*3*7,ab最大公因是（）,最小公倍是（） 英语翻译如题 怎么翻译比较好 【】the football?英语括号填什么 翻译 英语翻译A 和 B的关系 到底谁是2倍 举个句子的结构不清楚*（英语好的来）some of orange is for my sister.for 在此用法?为什么要用在中间?此句意思?where is the supermarket is?又没这句?如有,与where the supermarket is 有何区别?does she have any brot 一个英语长句,结构有些理不清楚,It has expanded without giving any consideration to the effects produced on the individuals and on their descendants by the artificial mode of existence imposed by the factory.主要是这两个by看的我 3个人坐在一排8个编号的座位上,每人左右均有空位的坐法有12种 病毒在侵入寄主细胞之前是什么样的? the agriculture revolution in the nineteenth century involved ...the agriculture revolution in the nineteenth century involved two things:the invention of labor-saving machinery and the development of scientific agriculture请问这句话的意思, 都有什么病毒通过侵入宿主细胞使人致病? 为什么塑胶件尺寸测试报告,FAI全尺寸报告OK,但是CPK重点尺寸NG 英语中twice as ...as的用法~麻烦各位大虾帮我看看这个问题,我已经是越看越糊涂了...Liu Xiang runs twice faster than me.That means Liu Xiang runs___ me.A.as fast as B.much faster thanC.two times as fast as D.twice as fast as -1+2-3+4-5+6…-2013+2014求值 likely,as likely ,as likely as的用法区别是什么?you are more than twice as likely to die of skin cancer than a woman,and nine times more likely to die of AIDS.这里面的likely,as likely用法有什么区别么~as likely as又是怎么用的 三道英语单项选择题.1、When you_____a job.think over whether it is really suitable for you first.A.relate to B.apply for C.find out D.ask for2.All_____had to be done has been done.We can leave and go home now.A.that B.which Cwhat D./3.His tw 发UFO给神起,如果有回复,是回复给手机还是回复给帐号