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people can talk about many interesting things____each other A.to B.with They are talking with each other for their families.改错 请问vb中那个dim是哪个英文单词的缩写?怎么可能是那个呢？ VB中的dim究竟是什么意思?是哪个词的缩写?答非所问 VB 中的dim 是什么字母的缩写吗?还是... 已知数列﹛an﹜的前n项和为Sn,满足Sn=2an-2n（n∈N+）1 求﹛an﹜的通项公式an2 若数列﹛bn﹜满足bn=㏒2（an+2）,Tn为数列﹛bn/(an+2)﹜的前n项和求证tn≥1/2 已知数列{an}的前n项和为Sn,且满足Sn=2an-2n(n∈N*)1）设bn=an+2,求数列{bn}的通项公式；2）若数列{cn}满足cn=log2 bn,求数列{cn\bn}的前n项和Tn. 已知数列AN的前N项和为SN,SN=2an-2n（N属于正整数）1求AN的通项公式2此数列是否存在三项ar,as,at（r小于s小于t）成等差数列,说明理由! 已知数列｛an｝的前n项和为Sn,满足Sn=2an-2n(n属于N*）（1）求数列｛an｝的通项公式；（2）若数列｛bn｝满足bn=log2(an+2),Tn为数列｛bn/an+2｝的前n项和,求Tn.（希望写出完整过程……拜托了……谢 Mary and Tom are talking with the phone 修改句子,一处错误 say to,speak to,talk to,tell to.的区别 已知数列{an}的前n项和为Sn,a1=1/2,且Sn=n^2An-n(n-1),求an 数列{An}的前n项和为Sn,已知a1=1/2,Sn=n^2An-n(n-1),n=1,2,...写出Sn与Sn-1的递推关系式（n>=2),并求Sn关于n的表达式 Tom often goes to work (riding )with his father.为什么用riding? Being with people really energizes you.与人们在一起真的能激励你? Tom,with his friends,often_______shopping注意是有逗号的!填go还是goes? Tom with his brother often__their grandparents.选哪个为什么啊谢谢A,goes to see B.go to see Tom with his father are from China.对么be动词应用什么呢? Tom likes English.He often () it with his classmates. A.speaks B.tells C.says D.talks 在英文中,动词加介词的短语中,代词做宾语能否放在动词和介词之间 下列数列中哪个属于动态数列 三角形ABC中,a,b,c分别是∠A、∠B、∠C的对边,已知a=根号10,b=根号3+根号2,c=根号3-根号2,则三角形ABC的积等于? tom s_english and they often help e_ other 根据首字母填空 英语填空题一道求详解7.The diplomat,selected for her demonstrated patience and skill in conducting such delicate negotiations,---- to make a decision during the talks because any sudden commitment at that time would have been ----.(A) resolv 求一道英语填空题详解1.In the nineteenth century,novelists and unsympathetic travelers portrayed the American West as a land of---- adversity,whereas promoters and idealistscreated —— image of a land of infinite promise.（A） lurid… 一道英语填空题(要详解）I would ask if she could ____ _____the movie. 一道英语填空题 Jane was asked a lot of questions,but she didn’t answer of them.A.other B.any C.none D.some 朗诵下面的诗句,说说应读出怎样的感情.而在这座山的那边,就是海呀.是一个全新的世界.在一瞬间照亮你的眼睛. 读下面一段话,应该读出什么样的感情1992年9月21日,党中央决定实施载人航天工程.载人航天工程,是中国航天史上规模最大、技术最复杂、安全性和可靠性要求最高的跨世纪重点工程.为了顺利 如何读出这句话的感情i have a wonderful ieda!Ha-ha!如何读出那种有点奸诈有点高兴的感情 体味下面两个句子,说说朗读时要读出怎样的情感:子非我,安知我不知鱼之乐?仰而视之曰：今子欲以子之梁国而吓我邪? 朗读怎么做才能读出感情呢?在朗读时候我找不到技巧?