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小明和小亮分别从相距20千米的甲、乙两地相向而行,经过2小时良人相遇,相遇后小明即返回原地,……小明和小亮分别从相距20千米的甲、乙两地相向而行,经过2小时良人相遇,相遇后小明即返 小明和小亮分别从甲乙两地同时出发相向而行.他们分别到达甲乙两地后立即返回.第一次相遇离甲地680米.第二次相遇离乙地340米.甲乙两地相距多少米?（知道答案,但不理解,求说明!） 小明和小亮分别从相距20千米的甲乙两地相向而行经过两个小时两人相遇相遇后小明返回原地小亮继续向甲地前小明返回到甲地时小亮离甲地还有两千米请求出两人的速度 补充 scooted up real close,怎么翻译 常州韦博英语要多少学费打算冲常州北郊的英语特色班,还有什么地方能提高英语吗 重庆韦博英语怎么样?重庆韦博英语到底收好多钱啊?我要了解,因为我准备切 求一篇4人的英语情景对话求关于Should animals be trained to help humans的英文情景对话 一定要四人的 不要很长 每人5-6句话不要很长 每人5-6句话可以偏简单但是不要偏难 closer than close 歌词的中文翻译Title:Closer Than CloseShe'll read your mindShe's smart as a whipShe'll suck you dryBut look at how much I dripAt the point of ecstasyI write a symphonyOf poetry in motionAnd leavin' me there to dieI tell myself 韦博外语如何?价格很昂贵,参加过韦博外语培训的请帮忙回答一下！ burned burnt区别我觉得这个区别很小吧!可是我做那个金太阳的题时它出现了,我搞不懂它们的区别 韦博英语怎么样希望有在韦博上过课的同学帮忙回答下, pay的现在分词 月见草分布怎样,长的什么样子? 夜来香什么样 推荐一本英语书,适合初一的,不用那种辅导的,有中文翻译的 儿童图书英语是children books还是children's books 学生们在教室里安静地看书.英文The students( )( )books( )in the classroom. 那些书是他的吗?_____ _____books? 二叉树的结点怎么算 有没有公式什么的? IBT新托福的口语流程是什么?就是新托福口语考试大概是一个什么步骤= =,具体一个流程是什么样子的.. 考大学家里请客,我的开场白,演讲稿~ why not后跟动词什么形式以及用法 can not后面加动词的什么形式 not后加动词的什么形式 why not 后面加动词什么形式?why don't呢? 发言 like to do 和 like doing的区别要说的比较容易理解要有例句和分析 do you like doing 与do you like to dowhat do you like doing? 可以改为 what do you like to do?吗 还有就是why do you like to eat here?可以改为why do you like eating here?吗why do you like to eat here?可以改为why do you like eating h like to do 和 like doing的区别是? () my dream school,we don't have to come to school every dayA.in B.at C.on D.of like to do like doing有何区别 1.Jenny usually wears a hat(对a hat提问) 2.have every to come don't to school we day3.dad basketball i play can't after my school says 4.students make to schools help rules5.在图书馆里请不要喧闹____ ____ ____ in the library