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keys are user by people （for/with/to doing) the door哪个对? the key is used by people for opening the door 】 keys are used for ____(锁) the door如题 the money is used--help the disabled people. a\ to b\ by c\ for d\with 为什么是a 说明理由越详细越好,好的有赏 he used to sleep with the door___(shut) 已知f(x)=e^x－e^﹣x,g(x)=e^x+e^﹣x(e=2.718…).设f(x)·f(y)=4,g(x)·g(y)=8.求g(x+y)/g(x-y)的值. 已知y=f(x)为奇函数,当x≥0,f(x)=3^x-1,设f(x)恴反函数是y=g(x),求g(-8)的值 用小液流法测定植物组织的水势与质壁分离法测定植物细胞的渗透势.都是以外界溶液的浓度计算其溶质势它们之间的区别何在? 楼顶上的水箱是密封的吗?为什么要这样设计？ Wolf At The Door 歌词 When someone k___ the door,I was sleeping. 说明白意思 prune trees and shrubs back from windows翻译这句话谢谢 error from server是什么意思 back from意思求大手解决困惑We will be back from England in three days这里的back是形容词还是副词啊疑问啊啊啊 wolf is always at the 如果细胞外液的水势高于植物细胞的水势,这种溶液称为? 中西方服装的演变过程用英文怎么说 改变的过程并非像你想象的那么难 用英语怎么说 陕西的面积有多大? 陕西省面积有多大 keep the wolf from the door 这句话的来历!我知道这句话的意思, keep the wolf from the keep the wolf from the door I juct come back from don't forget to close the door if you are the last person to leave?don't forget to close the door if you are the last person leaving?哪一句正确,为什么?关键是解说一下为什么? 初中有趣的事情同学们进入初中已经有一个多月了.这一个月来,你的身边一定发生了许多新鲜有趣的事情.请你选取一件写下来.讨厌的作文,帮帮忙要正式的作文....... 简单的动漫图片.能自己简单画出来的,多一点没事~就是这种 ji hong j ian 1 1 @ 1 2 6 .c o m Mom and Dad arrive back from vacation a day earlier than expected.than 和expected中省略的成分 是they were 还是they即Mom and Dad arrive back from vacation a day earlier than they were expected.Mom and Dad arrive back from vacation a day ear 选购太阳能热水器是热管承压的好呢还是真空管非承压的好?我装修房子要选购一款太阳能,可是不知道选什么的好.不知道是承压的好还是非承压的好,那位比较了解太阳能,希望帮我分析一下. 水压试验跟设计压力有什么联系 一条很有意思的科学题目刚看了腾迅的新闻,说宇宙有高级生物存在,而且还有上帝,我感觉太神奇了,这就不人与人之间的什么和什么了,这是超过一般事物的看法和想法了.大家对这个问题有什