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已知等比数列an前n项和为Sn,若s2=1,s4=4,则公比q= 等比数列an的公比为1/3,前n项和为Sn,n属于正整数.如S2,S4-S2,S6-S4成等比数列.则其公比为 求一篇卓别林电影观后感 英语版的 如何写外语好作文 l dont like it that he should be alone at home doing nothing at all dont like (it) that he should be alone at home doing nothing at all 为什么填it I bet you get a lot of Christmas presents!zhong wen yi si? He always watches TV at home on weelends.He wants to do （ ）this weekendA、different something B、different anythingC、something differentD、 anything different另外在说下意思 周记周记.我要周记 I don't think you know that you are the light of my world and I'm the luckiest person to know you.怎么翻译 You know?I think that is not my 座钟的摆针摆动一个来回的时间称为一个周期.其计算公式为T=2π√￣L/g,其中T表示周期〔单位∶秒〕,假如一台座钟的摆长为0.5米,他每摆动一个来回发出一次滴答声,那么在1分钟内,这台座钟大 初中数学,七年级的. 设公比为q（q＞0）的等比数列{an}的前n项和为Sn.若S2=3a2+2,S4=3a4+2,则q=______________. 设公比为q(q>0)的等比数列{an}的前n项和为Sn,若S2=3a2+2,S4=3a4+2,则q= Alice got a lot of presents and birthday cards _______ her relatives ______ her birthday partyA A for onB of atC from atD to on 黑龙江鸡西今天地震了吗? 2011年6月10日7点25分左右黑龙江省鸡西市恒山有明显震感,那里又地震了吗? 英语作文：my best gift that l ' vereceived 打错了 是8句左右 英语翻译可能有写单词写错了``` Sometimes keep slience is the best consider I still know that you are the best which treat me Met you is beautiful things in my lifeI always happiness that is only you so don't double yourselfyou are the best just I am not enough 鸡西市海拔多少米? 鸡西最低海拔是多少?鸡冠山海拔是多少? 少年闰土续写闰土还能讲哪些事 how about walking to the museum同义句=how about ----- ---- the museum ------- ------- 对括号部分提问 the young children were （very cute）._ _ the young children Where you a naught child when you were very young?如何作答 有关provide的用法can you provide us _ some imformation _ the computer?A.for;with B.with;about C.about;with D.with;with 判断：守法是法的实施的重要组成部分和基本实施方式.这句话为什么错 英语：provide的句型.说一两个就行. 续写《少年闰土》续写他们分别后说写什么,做些什么（150字） how about going to see the film?-OK.I'll__you at exactly 8:00为什么填expect 而不填wait 初三英语简单问题哈~1.You each___good sense of humour填with 还是has还是have还是are?再顺便翻译下是什么意思哦~