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关于正负数大小的问题若a/b小于0,那么ab____0 ; 若ab/c小于0,且ac大于0,那么b____0 ；若a=0.b小于0,则a/b_____0;若a大于0,b小于0,则a/b______0 几分之几和正负数怎么比大小 我要做ppt英文课件 去哪弄英文的文章啊? 《窃读记》的阅读答案转过街角,看见饭店的招牌,闻见炒菜的香味,听见锅勺敲打的的声音,我放慢了脚步.放学后急忽忽地从赶到这里,目的地可不是饭店,而是紧邻它的一家书店.我边走边想： 英语翻译如题,在半小时之内! 英语翻译只要翻译成中文的题目和内容! 正负5是25的什么数 25是正负5的什么数? 英语4级是什么概念 围绕“获取”这话题的一篇作文,500字（不要在网上抄一篇就算）谢谢 窃读是什么滋味 求各位大仙帮个忙 ,这几到题很急校园的早晨提纲:寻找春天提纲3:向你介绍我提纲4:我学会了坚强提纲: 1.2.4题咋做呢? 一道关于用洛必达法则求极限的题求lim(x->π)(π-x)tan(x/2)这道题我死活求出来都是一无穷大~我的具体步骤是：lim(x->π)(π-x)tan(x/2) = lim(x->π)tan(x/2) / [1/(π-x)] =(∞/∞不定式）lim(x->π)sec^2(x/2) / 1 = l 各位帮个忙,我特别喜欢一首歌,但不知歌名,所以希望各位大仙帮个忙!我只知道刚开始是说了两遍“one two three four!"然后就开始唱了起来.还有,刘谦亚洲巡演济南站中放过!希望各位大仙帮个忙! 题会.那位大仙帮个忙 谁能帮我写一篇作文,不要到百度抄啊!……我会看的! 有一个怪怪的奥数题题：对世界上任何六个人来说,其中至少有三个人,他们要么互相都认识,要么互相都不认识.请说明这是为什么? 一道很怪的数学题,在锐角三角形ABC中,AD是BC边上的高,BD上有点E,满足角BAE等于角DAC,求证：在AE上有一点O,满足三角形ABO,ACO,BCO均为等腰三角形. 急,求解两道洛必达法则求极限题!1.lim（sinx/x）^(6/x^2)其中x趋向于02.limx*[(1+1/x)^x-e]其中x趋向于无穷 sat长难句,In other words,science proceeds along a zigzag path toward what we hope will be ultimate truth,a path that began with humanity’s earliest attempts to fathom the cosmos and whose end we cannot predict.换言之,科学沿着一条崎岖 sat长难句“No,I won't ride with servicemen- ,”said my casually seditious father,as he slowed down and peered at a soldier and then resumed his full cruising speed,while I.patriotically offended.watched the stunned defender of my freedoms kickin SAT 句子提升Intimacy,love and marrige are three ( different,if interrelated,subjects.)这句话里面的“if interrelated”是插入语还是什么?那全句怎么理解呢? 如何加强SAT读句子和读段能力?最近感觉做SAT阅读很困惑,因为做一些题目时,需要看几句甚至一段的文字,但我好像很容易读偏,明明是那种难度分类是Easy的题目,做的时候觉得挺合理的,后来也 帮忙解释一道SAT语法改错题John believes that plants respond to human attention,which causes his talking to his African violets everynight.(A) attention,which causes his talking(B) attention and talking is what is done(C) attention and his t 请问这个极限怎么求出来的呢?不是用洛必达法则吗?为什么我求出来是1呢? 用洛必达法则求极限题目.n次开根号（x的n次幂+x的n-1次幂+1）-xx-)无穷 英语翻译🙏After segregationist practices barred Black American singer Marian Anderson from a scheduled Washington,D.C.,performance in 1939,the federal government sponsored her in a public concert on Easter Sunday.不需要全部翻译.只 SAT阅读句子求分析,求翻译He found himself hurt by the letter--wounded, to be honest, not only in his self-esteem but in some tenderer place, in that sense of contract( between people that transcends personal animosities and factional differe 一道怪怪的数学题找出一组正整数M,N,使M,N满足M平方-N平方=2010,则M=?N=? 人孔垫片有标准吗? 人孔有哪些标准?要全些的比如 化工部 机械部 国标等 哪种人孔最常用?