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姜小伟是你的知心朋友,上初中他就要到别的城市,你可以送他一句诗：--------------------------- 有没有一首诗,意思是世界虽大知心朋友难觅 写出王勃在送别好友时表明知心朋友声息相通的两句诗 In Our Tears的背景神秘园的《in our tear》有什么创作背景吗? 谁帮我翻译下这句子什么意思：leaves on the seinedavid lanz in our tears secret garden 学校绶带上写什么字啊 I__________{know] him for ten years. 质量是40kg的铁锤从5m高处落下质量是40KG的铁锤从5m的高处落下 打在水泥桩上,跟水泥桩撞击的时间是0.005S,撞击时,铁锤对桩的平均冲击力有多大 Ft=mvFX0.005=40X10F=80000N 这道题动量不守恒,可怎么 质量是40KG的铁锤从5m的高处落下 打在水泥桩上,跟水泥桩撞击的时间是0.005S,撞击时,铁锤对桩的平均冲击力有多大 一质量M=40KG的球通过长L=12.5M的轻绳悬于竖直面内的直角杆上,水平杆长L瞥=7.5M.整个装置绕竖直杆转动,绳子与竖直方向成*角（那个符号打不出来,图上有）当*角=37°时（g=9.8m/s,sin37°=0.6,cos37°=0. How did you know him?we___on the train to guangzhou in 1999 and we ___friends for ten yearsHow did you know him?we _met 、 have met 还是 had met__ on the train to guangzhou in 1999 and we _have been 还是had been__friends for ten years.要用什 质量是40Kg的铁锤从5m高处落下,打在水泥桩上,与水泥桩撞击的时间是0.05s.撞击对桩的平均冲击力有多大? main important之间有什么区别我好像有一点点知道,可是又不是特别明白,也不知道怎么表达出来．请多指教! 请问effective,efficient的区别?它们的英文解析是什么? effective与efficient有什么区别啊? 请问effective,efficient的区别?它们的英文解析是什么? effective 与 efficient 区别,要有例子 efficient和effective区别I don't think that is an ___ method of teaching math.A.efficientB.effective选哪一个?请给出具体解释, 안녕 是么意思啊? 英语翻译In most cases,the NOx estimates based on input data readily available from power plants were found within the range of measured data (with the worst estimate being 22% higher than the maximum measured NOx level).The CFD results also indic .안녕하세是什么意思 it was two years ago when i got to kown him(同义句） it is two years ___ ___ ___ __ __ him she has told you the truth.told前面为什么不加to?大she has told you the truth.told前面为什么不加to? 我宝贝女戴雅琳快满月了.请帮忙题个祝福语.以姓名题祝福语 用积分换商品怎么回答天猫给的问题我每次抢都抢不到,不知道是什么原因,我回答了两个问题错了还是怎么了,我也不会出错的呀,为什么每次都提交不了,后面就点不行了,说还有机会,别恢心, Tell me Most cost-effective H.264 DVR supplier severe penalty would be the most cost-effective way to deter those would-be driving offenders.severe penalty would be the most cost-effective way to deter those would-be drivingoffenders. 英雄联盟排位赛积分怎么算?虽然我知道新的系统准备上线了. 和英语单词nose发音一样的是什么 just lose it 求英文好的 把这歌的准确发音注1下..就是2分24以后那段词 我想翻唱 可是音总也踩不准 不知道哪个单词该发音 哪个单词该省略..请教英语帝用中文注释1下 ...急用..从2分24开始 以后 初中英语 急!谢了1.是have a faver 还是 get a fever2.be sure of 和 be sure about的区别 最好有例子3.——present you have bought for me !填what 还是 how4.--Go and ask the waiter how much the meals costs. --Don't worry.It has been 初中英语,谢啦～