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why couldn't they catch the 6:30train?Because they were delayed by()some heavy traffics,any heavy traffic,a heavy traffic,heavy traffic选哪个? 高中化学变价元素有哪些?速度求解!常用的 we must keep the reading room quiet改为一般疑问句怎么改 化学中有变价的怎么分别比如说铁 铜 碳 we must keep quiet in the reading room.(保持原句意思不变）We must keep quiet in the reading room.(保持原句意思不变）We _______ _________ in the reading room. 为什么有的元素会出现变价?如CO和CO2,为什么碳元素会有变价? You must keep s_____ in the reading room K Na S Cl Fe 他们的变价都是什么?以及这些边家的转换是怎么进行的?氧化还原反应倒地怎么个怎么进行罚? Plese keep ______(quietly) in the reading-- room. we must obey the r___ in the reading room She has breakfast before she goes to school.（就has breakfas提问t）（） （）she （） before she goes to school? I don't know what's the matter 还是 I don't know what the matter is还有what`s wrong ;what`s up 在宾语从句中到底如何应用 I don't know what is the matter还是 what the matter is What's your phone number这个英语句子对不对? God bless me never and ever是什么意思?如题 谢谢了 what's your phone number? 求翻译! May every happiness be yours at this beautiful season,God bless you,and thank you What's your moblie phone number是什么意思 god bless yours 和god bless you的用法?god bless yours 和god bless you怎么个用法?有什么区别?看不懂yours的用途?是祝福你周围的一切吗?什么时候用yours?哪位朋友懂, What can I do for you?怎么回答 What can I do for you它的同义句是什么?dislike近义词 what can I do for you可用什么回答这其实是一个选择题,答句是"yes,please.I'd like to have soup”问我问句是什么请问是用"would 有you like to have soup”还是"what can I do for you”好?what can I do for you=can I help you 同义句转换 What can I do for you?Can ＿＿＿＿ ＿＿＿＿you?Do you have a cat?＿＿＿＿ you got a cat?I dislike my noseI ＿＿＿＿ ＿＿＿＿ my nose What can i do for you的同义句?What can i do for you的同义句除了May（Can) i help you外还可以怎么说啊? 热压炉可以抽真空通气氛吗?有介绍的厂家最好? The chairman asked ____ to write their questions on a piece of paper and send them to the front.a.the present memberb.the members presentc.the members presentlyd.the presently members选什么,一个一个说一下, how to spend paket money谁会这样的英文作文啊~会的教教我~ 气氛保护箱式炉,带气体保护的气氛保护箱式炉哪个型号的比较好?气氛保护箱式炉的温度要求1200度. I'm 是说别人喜欢他 他接受对方什么的吗?不理解..我知道歌词。我就是想知道是不是 别人追他 然后他接受别人？ 请问气氛保护箱式炉哪个厂家的好?气氛保护箱式炉的原理是什么?可以充氩气吗?最好能提供详细的气氛保护箱式炉的参数, I'm yours. 高温箱式炉放氧化保护气氛用什么介质?