已知液压缸面积A1等于A3等于100平方厘米A2等于A4等于50平方厘米

they 在干什么?回答:they 在等同学!用英语回答这2个问题[急!] 一、写出下列动词的第三人称单数 drink ________ go _______ stay ________ make ________ look ________　　look _________ have_______ pass_______ carry ____ 　　come________ watch______ plant_______ fly ________ 　　study_______ brush 找出句子中的错误并改正.they speaks english in australia 他们正忙着工作的英语,They're __ __. 求 新概念英语1-4册 IPA格式（Touch4 能安装的）,要有声音版本的主要发第三和四册，有声的，没越狱的touch4能装的，谢谢了 邮箱459693681＠qq.com 求 新概念英语1-4册 IPA格式（Touch4 能安装的） 发给我一份呗!如果有,给我一份. love you not because of who you are but because of who i am when i what you Someday you might know the turth what I did all for you just because love. I love you not because of who you are,but because of who I am when I am with you .I just want cry谁帮我翻译过来 谁能提供几个外国人的MSN给我,目前正在学英语中 求一篇英文文献,求这篇英文文献Photosynthetic Acclimation and Nitrogen Partitioning Within a Lucerne Canopy.II.Stability Through time and comparison with a theoretical optimum.Functional Plant Biology,1993,20(1):69-82. 已知a/2=b/3=c/4=k,则（b+c）/a= 若此题改为:已知2a=3b=4c,结果又如何 I love you,Not only for what you are,But for what I am When I am with you. He speaks English very well .怎么回答 He learns English very well.改为同义句 He ( ) ( ) ( ) English. 自学英语~~·下一步该做什么呢?~~我自己学完音标后~开始背单词~现在大概记住了一百多个的单词·~下一步是不是可是开始接触语法了?还是说继续累计单词量~~ 如果想自学英语首先应该做什么? 自学英语应该怎么做,注意些什么?以前一直对英语没有兴趣,现在突然很想学习英语,我现在的基础相当于零吧!希望有对英语方面的高手帮我计划一下应该怎么入手第一步! I love you not who you are but who I am when I am with you!怎么翻译 take sb.out 是约会的意思吗? 哪些国家母语是汉语 以汉语为母语的国家有哪些? twice a day是否等于twice per day 能说twice every day We should brush our teeth twice every day.对划线部分提问（twice every day）____ ___ ____we brush our teeth?三个空 Your mother needn"t waters the flowers every day哪里错? my mother____ (看)TV every dayDo you want to _______(加入）the English club?Welcome to _______（我们的）school.三题都要回答 twice every week这样表达跟twice a week一样吗？ 想自学英语,推荐几本书 想自学英语,谁可以帮我 You are my only love谁能帮解释这个英语给我看 know sb,know about sb中哪个是指知道某人但不了解? know sb well