我的学校作文三年级

but many boys in my school l___to play football on the playground after school 改句子:1.Do you often play football after school?(肯定回答) 2.I have many books.(改为否定句) 3 my healthy lifestyle helps me get good grades 就划线部分提问划线部分是My healthy lifestyle 求My healthy lifestyle helps me get good grades.的语法成分? 数列{an}满足an+1+(-1)^nan=2n-1,则{an}的前60项和为________.这一题我是这样做的,a1=a1,a2=1+a1,a3=3-这一题我是这样做的,a1=a1,a2=1+a1,a3=3-a2=2-a1,a4=a3+5=7-a1,而a5=7-a4=a1,就是说每4项就开始循环,前四项的和为10, 数列{an} 满足a(n+1)+(-1)^nan=2n-1,{an} 的前6项和为 数列{an}满足an＋1＋(－1)nan＝2n－1,则{an}的前60项和为里的一步当n＝2k时,a2k＋1＋a2k＝4k－1,当n＝2k－1时,a2k－a2k－1＝4k－3,a2k＋1＋a2k－1＝2,a2k＋1＋a2k＋3＝2,a2k＋1＋a2k＋3＝2是怎么来的 数列{an}满足an-1+(-1)nan=2n-1 数列{an}满足an+1+(-1)^n an=2n-1,则{an}的前60项之和是多少 求一篇800字的 辛亥革命读后感 不要抄的 求一篇《辛亥革命》电影的观后感1500字,最好不要重复别人的. I don't need sexy ,the government fucks me everyday 数列{an}满足a(n+1)+(-1)^n*an=2n-1,则{an}的前60项和为? 大神数列{an}满足a(n+1)+(-1)^n*an=2n-1,则{an}的前60项和为? 大神帮忙啊!谢啦! I don't need sex i don't need them any more any more什么意思? the reason ( )he refused the invitation was that de didn't like such parties.Awhy Bthat I don't need you any more是啥意思?分手后ta说的话 Husband don't need any more without my cute wife.不要软件翻译, 怎么过英语六级啊,我四级467刚过,都没怎么做过四级题,语法么都不会.怎么过六级啊?大侠们!我肯吃苦. 过英语四级除了背四级词汇,语法也要看吗?语法是不是都是高中的! 英语 语法在高中是不是几乎学完了,考四级大概是不是这些语法. 已知点m（a-1,3a）在低3象限,它到x轴和它到y轴距离一样,求点m坐标 四级和高中的语法差别大不大? 端居 李商隐 翻译 考好四级,我没学过新概念,但是英语还行,语法什么的在高中没问题但是四级的语法会有更高级的吗?若想考一个较高的分数,如果不够用,那么有哪些比较好的、更高级的语法书呢? 考四级时语法用高中的五三够么? 复至裴明府所居李商隐翻译这首诗写的究竟是什么意思伊人卜筑自幽深，桂巷杉篱不可寻。柱上雕虫对书字，槽中瘦马仰听琴。求之流辈岂易得，行矣关山方独吟。赊取松醪一斗酒，与君相 1.That is_______book 用适当的人称代词填空：1.This is ______(I)book,that is_____(she).2.These are______(they)flowers.3.______(she)brother is six,but_____(l) is sevsn. 大学四级4000词汇中有多少是高中词汇啊请问 用neither或so造句 1、She didn't remember and l didn't remember,either.2、Tim has changed and l have changed,too.3、My parents like music and l like music,too 4、If you won't go and I won't go either. The boy is tall(改成以what a引导的感叹句)