若对任意的3维向量x=(x1x2x3)r,AX=(X1X2)(2X1-X3)，则A=

适合四女一男的英语短剧剧本?时间大约是10分钟之内, 1.This is very （ ）book.A.excite B.excited C.exciting2.The young people are ( ) to see their favourite super star.A.excite B.excited C.exciting That sounds very ____.A.excite B.exciting C.excities D.excited exciting,excite,excited的区别 He comes back.I'll tell you at once.改为条件状语从句 格式：I ___ ___ you at once ___ he comes back he comes back .I tell you at once,改为条形状语、怎么改? ------ he comes back,I'll tell youA where B when C how D what 房间里没有花翻译英语 “你的房间很乱,你最好花点时间整理一下”英语怎么说 is rick there?no ,he _ for beijing three days agoa leftb leavesc leavingd has left我只知道c是进行时不行其余的请解释一下 He visited my house there days ago (同）he ____ _____ to my house three days ago 急寻英语短剧剧本,6个人演,去外国朋友家做客.如提,不要太长五分钟 she sitting in the room为什么不加IS我在做一个填空题时,Our teacher(stand not)____up right now.She (sit)_____on the corner of her desk.正确答案是：doesn't standing sitting,为什么不是isn't standing is sitting呢?我看书中正 the last but the word “it” in the last paragraph but one refers to The last but one paragraph是什么意思啊?就是因为不理解,做题做错了. 修剪花朵的英文单词英语单词! 4个人演的英文短剧剧本,谁有呀,提供下,4个人演的英文短剧剧本,我念初一（英语水平也是初一）,最好很好笑（童话最好）,当然别的也可以,3分钟演完,不要很长,4个人,1个旁白,3个演员.俄索很 i really need an -------vacation.是填excited.还是exciting拜托了说明理由 --I went to HongKong Disneyland last weekend' --Really?-------------?A,Is that all right?B,How was it C Why not invite me D How are you doing请问选哪个呢?请给出详细点的解释哈, 请用exciting / excited / tiring / tired填空(1).Liu Xiang won a gold medal in 2004 Olympics.We Chinese are very _________.(2).They watched a very ____________ basketball game yesterday evening.(3).The ____________ meet lasted 2 hours.The students 同义句It is a very exciting vacation = It‘s___ ___exciting vacationRTRT.想了半天了同义句转换.It is a very exciting vacation .It‘s___ ___exciting vacation. 为什么南北回归线以外没有太阳直射点 如图所示雌雄果蝇体细胞的染色体图解,请回答 谁能帮我写下工作总结 2013下图为一对雌雄果蝇体细胞的染色体图解,其中Ⅱ、Ⅲ、Ⅳ、X、Y表示染色体,基因A、a分别控制红眼、白眼,基因D、d分别控制长翅、残翅.请据图回答： （1）由图可知,果蝇体细胞中有 个染 右图是果蝇体细胞的染色体组成,以下说法正确的是右图是果蝇体细胞的染色体组成,以下说法正确的是 A．染色体1、4、5、7组成果蝇的一个染色体组B．染色体3、6之间的交换属于基因重组C 1.(are you doing) anything interesting this weekend?可以写成did you do anything interesting this weekend?2.going on意思3.为什么香港可以50年不变? Did the teacher say _______ in the last lesson.A.something interesting B.anything interesting I think Ishould tell you just say I\'m sorry这句英文什么意思 游乐场的门票原来每张60元,十一期间九折优惠,刘老师一家三口去游乐场玩,购买门票一共能省多少元? 某校有13名教师带领145名学生去游乐场玩,买哪种票比较合适至少要用多少钱?成人票32元1张学生票13元1张团体票17元1张（至少50人）