已知数列an的前n项和为sn，且满足sn=ann2-1，求an的通项公式

连词成句:girl,in,who,the,poll,is,swimming swimming,father,a,pool,is,now,my,swimming,.连词成句 CHICAGO怎么读 Walt disney,the great film-maker,was born in Chicago in 1901 Lessons start at nine o'clock课文全部神啊,来救救我吧 He ___(start) lessons at nine o'clock. We need help _____ sports.请问这里是填for 还是 with合适? 英语翻译翻译成一句 英语翻译The figure of Herbert Hoover has became a kind of fixure or behind contriversial one in the turbulence sweep of world history in which we not live Probably no man had more effect on the daily lives of most people in the Untied States than did Henry Ford a pioneer in automobile production.这里的did是什么意思,起什么作用~这句话能不能这样说Probably no man than Henry Ford who i we.start.lessons.at.nine.o'cwe.start.lessons.at.nine.o'clock.(改成一般疑问句）______you.________ _________ at.nine.o'clock. Are you need help and you need help with grammarAre you need help and you need help with grammar 的意思 help.with.造句有翻译 要有翻译 your a has swimming school pool got（?）连词成句 几种染色剂的使用原理、使用方法归纳 为什么Cu2O可以做染料,为什么Cu2O可以做染料,不会被氧化, 有一首英文歌开头是look at me 看着我 我这个完美的女孩 那是什么歌啊? 舒缓英文歌,女生唱的,求歌名,开头是i look at you you look at me i look away so you can't see Very cold is,a swimming pool,there,in good,our,city (连词成句） a swimming pool 是连着的 四.根据中文提示,完成下列句子.1.今天天气很冷,但是阳光明媚.It's very cold,_____ quite _____.2.你和他,谁的年龄更大?Who is _____,you _____ he?3.他不仅歌唱得好,而且舞跳得漂亮.She can _____ _____ sing,but als 用have a look造句如题造3个不一样的句子 She is afraid to go into dark rooms by h＿＿ After the movie ,it was l＿＿Parents s＿＿didn't come back home.第一题是到h＿为止 move away和come away的区别是什么 壳牌 道达尔 哪个好 chicago69芝加哥69代表什么意思?那天给对象买了个卡车帽,上面用水钻拼成chicago69,请问这代表什么含义呢? move away from 去掉 away可以吗意思一样吗 As children get older,they become more and more interested in everything.开头能不能换成As their kids grow up,they become more and more interested in everything.随着孩子的长大,他们对一切事物变的越来越有兴趣 用have sth in common来造句. 案件审判已结束 是 The trial of the case has finished 还是The trial on the case has finished 麻烦帮着翻“Chicago is the kiss ” 不要翻译成什么芝加哥是吻! 史称“七君子事件”的七君子是谁