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如何去除水中的氯气不要生成对金属有腐蚀作用就行, no2为什么对金属和非金属材料有腐蚀作用?如题,请详细回答.不是强腐蚀性吗？强腐蚀性指该物质具有极易与周围介质发生化学反应 氯气会腐蚀玻璃吗? As far as I know,I can speak only English. Sorry babe,I can only speak English It is h---to know what they want instead.(2:4) there is not many things to do这句话不对的 ,应该把many things 改成 much,为什么 There is not only much to see but also many things to do in London! 这句话有什么语法错误么? when you are so closed to my To be are not to Deluxe Ed,翻译成中文是什么 I am afraid i can not speak English with you翻译成中文是什么意思 do get up when in the morning you 连词成句请解释下汉语意思 It helps you to find the place that you want to know. To review my lessons,I want to find a place that is free of noise.这里的that可以用which替换吗? The book which I need it isn't in my schoolbag.All that I could do is to send him to school.Dr.Stone,who has come for a visit to China ,arrived in Beijing yesterday.This factory will not take anyone of that eyesight is weak.哪里有错为什么要 在英语中关于现在完成时要注意的语法? What i need is____book that contains____ABC of oil painting. 答案是a；the请问,ABC（基础知识）前用the是因为其后有修饰限定成分（oil painting）,那先行词book后的定语从句也是限定修饰book的,因此应该是特指 现在完成时的结构是什么?还有关于英语的语法知识, What I need is a book that contains the ABC of oil painting.请大家分析一下此句所涉及的语法,并一一点出好像是倒装句 ,如果是请帮助我还原句子 英语现在完成时语法解答!since加时间点,for加时间段,时间点和时间段怎么区别啊?还有have been to 和have gone to 的区别和用法!急! 关于现在完成时的语法 What I need is______book that contains_______ABC of oil painting.这句话中的ABC怎么理解? take a trip anywhere是什么意思 Excuse me,does Mr Smith's son live here? He ___ ,but he has moved somewhere else.A.is used to B.used to C.was used to D.had to我觉得选 B 或C都可以的 . 给个回答 .. used to：过去常常 was used to：习惯于B、他过去住在 Does Mr Green live here?Yes.He ____ here,but he has just moved away.A.used to liveB.will beC.has beenD.is He does live here ________. 昨晚梦见给别人抬棺材是什么意思 用the、the、in、do、children、in、get、when、up、morning?联成句子 现在完成时什么时候需要用到beenMy brother has never been abroad befoer,so he is finding this trip very exciting.求此处been的用法 现在完成时什么时候用been,什么时候用done 现在完成时这里为什么要加been,什么情况下要加been?