4.如图所示，两个结构和尺寸均相同相互串联的液压缸，有效作用面积A1=100cm2，A2=80cm2

do well in 请问;I am not doing well in PE.与The girl doesn't do well in maths.有什么区别吗,not 后面应该是跟do well in 还是doing well in啊,那don't后面又应该是跟do well in 还是doing well in呢? 八路军 和 新四军 的抗日事迹本周4以前 Do he have some markers?这句话为什么不用Does he? Does he have a coccer.中的Does he 后为什么要跟have不跟has 英语翻译要全文的翻译(从蜀先主率大众东伐吴.) 咋样描写同学外貌特征 you are so young that we can't leave you at home by ()AoneselfBourselvesCmyselfDyourself 次元空间,多元宇宙 宇宙有多少次元啊?次元的入口是黑洞,那出口呢? 宇宙外面是几次元空间啊艹°=_=就是宇宙宇宙如果有边界的话 He said to me,"Will you be free tomorrow?"改为间接引语 He said to me"you will be able to get a free ticket at the room tomorrow." 第二天时如何改为间接引语 表示很相信神佛的成语 翻译不要机译 黄河（yellow river） 是世界上第二大河 Are you going to leave_____?A the window opensb the windows opensc the windows opend the windows opened Are you going to leave the windows____.填open还是opened?怎么解释?正确答案是open Are You Going To Leave Me?歌词 We are from china,and we are all C________根据单词开头字母,写出单词的完全形式 are going to leave 的同义词是什么? And all of these stamps are from China,too翻译这句英语为中文 ★★★★★急求.三国演义中曹操、司马懿、张辽、许攸、郭嘉 外貌形象、性格特点、和著名事件简介.曹操、司马懿、张辽、许攸、郭嘉★外貌形象（要是原文的）★性格特点、★著名事件 表示器物外形的词语 表示人外形的词语 表示外形的abcc式的词语 怎样写好干农活的作文 暑假可以干什么农活 关于国庆节在家干农活的作文 暑假都有什么农活,该怎么干. 连词成句1.weather,like,tomorrow,what's,the,going to,be 2.seven,what,we,at,do,o'clock,are,going,to,t1.weather,like,tomorrow,what's,the,going to,be 2.seven,what,we,at,do,o'clock,are,going,to,to,tomorrow3.picnic,park,in,the,going,we,are,a,have,today 暑假里干什么农活可以写作文 I'd like to take some seafood to you tomorrow.请问有错吗? I'd like to take some( 意见) from my Mum 括号里的词是什么?那个词的意思是意见,词是a开头的.