运输优化模型

1.一个长方体游泳池长50m,宽30m,深2m.这个游泳池的占地面积是多少方米?1.一个长方体游泳池长50m,宽30m,深2m.这个游泳池的占地面积是多少方米? 一个游泳池长是50米,宽是25米,深是3米.这7游泳池的占地面积是多少干方米?在它的四壁及底面都铺上瓷砖部分的面积是多少? 某公园建一个长方体游泳池,长30米,宽10米,深2米.（1）在池壁1.5米高处画一条水位线,求水位线长多少?有奖的! 银行花园小区内有一个长方体游泳池,它的底面周长是36米,已知长,宽,水深之比是12：6：1,问水深多少米 某公园建一个长方体游泳池,长30米,宽10米,深2米 1.游泳池的占地多少平方米 2.在游泳池的底部和四周贴瓷,贴瓷砖的面积是多少3.在游泳池的内壁1.5米高处用白漆画一条水位线,水位线全长多少 change the way we speak take a walk ____ the quiet park on Center Avenue 为什么是through而不是from take a walk through the park on center avenue 怎样变成否定句 tell me why这首歌的背景RT tell me why什么意思啊 tell me tell me why 是谁唱的?注 不是那小男孩唱的 是个女歌手 有点像玛利亚凯莉 跟 凯莉克莱森的声音高潮就是oh tell me why.歌名可能不是tell me why 回答方面可能有点广 听过的帮下我 是外国女歌手... It is no use _____ about it,because he will never change his mindA：to argue B：or arguing C：arguing D：for arguing 14.It is no use _____ about it,because he will never change his mind it is no use（persuading）him because he will never change his mind,求分析句子成分,persuading在句子中成为什么成份? It is no ___arguing with Bill because he will never change his mindA.useB.helpC.timeD.way在这里use和help有什么区别呢? It is no use_anything with Thomas because he will never change his mindA to discussB discussing with a teacher like you,i'll learn it fast. learn the new skills与 learn new skills有什么区别啊!那个是对的啊! We also need to learn service skills的意思 the process of learning skills to do something什么意思 老虎什么时间捕食? 有人能告诉我怎么提高英语口语吗?心情沉重. 如何加强英语口语,表达如何在短时间内加强口语,表达能力.看电影,听听力,阅读,还是什么? basic life skills 意思 while institutions called school will remain place for children to learn basic skills,electric communications will bring knowledge to people at every age wherever they are,这句里面 institutions 为什么要用called? learning a foreign language involves five basic skills,what are they?回答 求VF中程序题“M!/(N!*(M-N)!要用有关子程序的调用知识，也就是要用DO。可以不？ tell me why 的中文版叫什么歌名?知道赶紧说下谢了 我会给你高分的 介绍几首像Tell me why这样的歌 when was it invented?when充当句子中什么结构?invented呢? i dislike it when others laugh at me in public or think poorly of me behindwhen others laugh at me in public or think poorly of me behind 是完整句子吗?it 作形式宾语时的真正宾语一定是句子吗?