30岁还一事无成

有一句英文的经典句子,是两个句子,后面一句是类似于you must lost before found.3Q! 已知关于x、y的多项式（m-3）x的3次方+3nxy的2次方-xy+y不含三次项,求2m+3n的值 1 3 7 15 31等这些 怎么列公式?还有2 6 14 30如何编谢谢,能不能再举个例子呢 当K等于多少时 5xy+4z-6y+5xy不含xy的项 （这道题的意思与解析）当K等于多少时 5xy+4z-6y+5kxy不含xy的项 二元二次二次项系数相等且不含XY表示什么曲线 若x＋2（k－1）xy＋y-k不含xy项,求k的值 win7系统安装魔兽出现:请放入标识为“Wrath of the Lich King Disc{Disc}的光盘 官方客户端安装到2%时提示请放入标识为“wrath of the lich king disc{disc}"的光盘如题 求解决办法 安装3.22到一半出现 请放入标识为wrath of the lich king disc{disc}的光盘是怎么回事? 30、31题 要有公式的 完整一点 谢啦! 用光盘安装是跳出请放入标识为wrath of the Lich king disc 1的光盘怎么办 A family without love is not so much of a family as a body without soul in a man.这里为什么用 so much of 19又14/19×(-13/12)+(-19又4/19)×(-13/12). 现代大学英语精读1~4册的词汇可以发给我吗?我真的有急用, The boy's favorite subject is sports怎么读 口吃者的聪明表现在哪里 阅读 关于unless和until的高一选择题-was his father very strick with him when he was at school?-yes.he had never praised him _____ he became one of the top students in his grade.空里是unless和until的选择,一般区别是unless引导条件状 毛姆读书随笔和毛姆读书心得有什么区别? 初三英语一条单项选择题（连词类）有关until与unless的区别The baby cried again when I tried to give him a bath _____ I started to play with the water.A.after B.until C.whenever D.unless但我认为是D,为什么选B不选D? 怎做读书心得?在放假前回, 初中英语.这题应该选什么?我倾向until 但是unless为什么不行呢,其他的选项呢 读书心得怎 Does yaoyao and joy come from canada?这句话有错吗? 翻译此句子"so when does mrs .smith come back?'' 英语一般过去时的第一人称变化,do应怎样变I did a lot of work yesterday 改成He为主语 service 服务;效劳;帮助[U][P1]He died in the service of his country.[U]代表不可数[P1]代表只用复数,这是我在百度词典里找到的,这不是自相矛盾吗, 英语翻译请帮忙翻译一下coldplay的Everything's Not Lost,不要机翻,When I counted up my demons Saw there was one for every day With the good ones on my shoulders I drove the other ones away So if you ever feel neglected And if you think t until 和unless 有何区别i won't play with you unless you give up smoking .until 我觉得都可以,那么说这两个词有什么区别?she wouldn't go out with me again unless i gave up smoking 此处可以用until until 用于否定句时，主 UNTIL 与UNLESS的区别UNLESS做从句 主句是不是要有WILL?UNTIL做从句 主句可以加will吗?我看到的unless做从句的貌似主句都有will. 结尾是e的变复数加什么 语文听写字词总是出错怎么办,有没有好的方法 turn off的读音问题我这里有《走遍美国》的光碟.里面有一句：I have to turn off the lights,turn读为[tren].还有,我听过一个英国人说It is 为[it's is]（音）.不知是为什么?有哪位朋友知道的,