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在液压系统中,通径写着NG30,是什么意思?DN20是不是指通径是20mm啊?还有DN和NG之间是什么关系?NG30是不是指直径也是30mm啊? 三星手机root?是什么意思啊? 三星手机上面显示pM是什么意思 有额外分!急!某中学八年级同学学习电学知识后,自制了一个水果电池某中学八年级同学学习电学知识后,自制了一个水果电池.他们把铜片、铁片插入橙子中,并在铜片和铁片间接入小电灯,小电 带径通的成语 英语翻译在下感激不尽! many countries are located on river怎么翻译 英语翻译In many countries there is a fixed charge for personal services.A certain percentage may be added to the bill at a hotel or restaurant "for the service".In other places the customer may be expected to give a tip,or a small amount of money 带通的成语有哪些成语 There`s as mcuh competition among countries to host the Olympics as to win Olympic I don't know whether this is the best way 是什么句式?是什么从句? Today,my dad sat me down for a walk.求翻译.尤其是sit me down 这个用法 翻译：今天,从我们祖先那里传下来的许多风俗传统正在消失.(come down) 英语翻译You might feel let down today and your first inclination is to fill in the emptiness with additional excitement. 求翻译!删除昨日的烦恼,下载今天的快乐,设置 明天的幸福! it is the best hotel that i have ever stayed in 这是什么句请详细解释为什么书中说是含定语从句的主从句 应用英语和商务英语有什么差别?哪一个比较好? 用所给字母开头的单词填空1.I like "China Youth".It is a very interesting m______.2.My father has a big c_______ of stamps.3.Peter is g______at music.He plays the piano very well.4.The old man f_____over and hurt his back.5.I bought a puzzl 用所给的字母开头的单词填空1.I like "China Youth".It is a very interesting m_____2.My father has a big c___ of stamps 3.Peter is g____ at music.He plays the piano very well.4.The old man f____over and hurt his back5.I bought a puzzle,bec 初中首字母填空-o打头的单词The most interesting things are always the most difficult o_____. 搪瓷反应釜的釉质主要化学成分有什么? 帮我总结下初中化学盐类的物态 谁能给我讲讲辅音浊化的有关知识.many thanks 轻辅音浊化的条件 英语中辅音的浊化有什么规律? 所有跟在s后的轻辅音都要浊化么?是否在单词开头、中间、结尾都要浊化？ This questions whom you asked.这句话对么?如果对,如果不对,怎么改?应该是question，打错了 当省运会的志愿者 还得面试 为什么当志愿者 你对志愿者有什么当省运会的志愿者 还得面试 为什么当志愿者 你对志愿者有什么认识 ,广东开省运会,我们英语老师要我们写篇作文以省运会志愿者能为省运会做些什么为题初二英语作文就是,假如是一名省运会志愿者,能为省运会做些什么,写一篇初二英语作文, 那几种情况轻辅音要浊化?s后面的p k t 要浊化.这我都知道.我想问还有没有其它情况?最近遇到几个单词capital hospitality happy.发现它们轻辅音都是p.在p前面都是元音,结果就浊化了.难道这也是轻 S后的辅音浊化 在文字下方拉一根横线怎么弄