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已知：（a+b）² =7,（a-b）² =4,求a² +b² 和ab的值. 小平到玩具厂装配玩具车,前7天装配294辆,照这样的效率,又装配23天,应再装配几辆就完成任务（用比例解 求类似 The Beatles - Hey Jude 的歌. 关于某种动物的具体情况介绍,字数300包括动物名称、主要特征、生活习性等内容 介绍一种国家一级保护动物（字数不少于200字）可以照总分总的结构来写,分中可以分成3部分：外形特点 生活习性 传奇经历（这个可有可无） 300字动物介绍(陆地动物)不可以 只要一种 on the back of with the back of home的意思 150和12的最小公倍数帮帮忙吧 提高声光控开关声音灵敏度装后发现灵敏度不够高,要很大的声音才能点亮 一搜轮船从甲港出发,顺水每小时行24千米,4小时到达,返回时逆水航行,用了5小时回到甲港,这艘轮船往返 一搜轮船从甲港顺水航行到乙港.每小时是24千米,到达已港后有逆水航行返回甲港.已知轮船逆水航行比顺水航行多用2小时,水流速度是每小时3千米,甲乙两港之间的距离是多少千米? 某种洗衣机的包装箱是长方形,其高为1.2m,体积为1.2m的三次方某种洗衣机的包装箱是长方形,其高为1.2m,体积为1.2平方米底面是正方形,则该包装箱的底面边长为多少m 一搜轮船顺水每小时24千米.顺水速度与逆水速度的比是8：7、这艘轮船逆水每小时行多少千米? 某种洗衣机的包装箱外形是长方形,其高为1.2米,体积为1.2立方米,底面是正方形,则该包装箱的底面边长为几米? 英语翻译励志经典 The Joy of LaborAnonymousWise men of ancient times and successful men of today have told us thatlabor is sweet.Its reward is not material gain but what one becomes by it.Work does much more for us than just giving us a living 英语翻译President of Venezuela Hugo Chavez rounds the bases of softball games. the beatles 的倒是hey judy还是jude啊judy 和jude有什么不同 还是发音相同? log3 2/log5 4怎样化简（3和5是角标） 某洗衣机包装是长方体的箱子,2米,体积1.2立方米,底面是正方形,则该包装箱底面边长为多少米? an envelope of 的用法This is an envelope of gasses around the planet请问汉语意思! an envelope of 有没有表观的意思？ 童年趣事怎么写? 世界上最短的科幻小说续写 世界上最短的英文科幻小说 如图,∣OA∣=∣OB∣=1∣OC∣=5.OA与OB的夹角为120度,OC与OA的夹角为30度,试用向量OA,OB表示OC 求助英语翻译,望高手帮忙~~~They favor stylish products that emulate the purchases of people with greater material wealth. Many Strivers see themselves as having a job rather than a career, and a lack of skills and focus often prevents them 英语翻译Assessment of the constitutive law by inverse methodology:Small punch test and hardnessThe relevance of small-punch tests and indentation (hardness) tests are compared with regard to the determination of aconstitutive law in the case of n 英语翻译Total down the columns for Total Value,Scrap Allow and Net Value to indicate the amount owed by Medela.Return the original Termination Claim form,copies of the High Point and Current Medela Supplier Supplier Schedule,along with supporting 英语翻译就是甲壳虫乐队的那首,由孙燕姿翻唱的歌曲. 英语翻译我用了各种翻译软件,但是好多句还是翻不出来.请指教,Hey Jude,don't make it bad.Take a sad song and make it better.Remember to let her into your heart,Then you can start to make it better.Hey Jude,don't be afraid.You we 稳压管串连一个二极管 作用?解释!求助!谢谢