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将一定量气体x与一定量气体y同时通入溶液z的洗气瓶中,最终肯定有沉淀生成的x：NH3 Y:SO2 Z:BaCl2这一组为什么不行?可以帮我讲一下BaSO3 的一些特别的性质吗?比如说在不同的酸中的反应,在碱中 1.HCl遇到碳酸钾溶液产生无色气体是什么?2.只用一种试剂,一次就能区别HCl、BaCl2、KNO3三种溶液,这种试剂是A．硝酸银溶液 B．稀硫酸C．碳酸钾溶液 D．氯化钠溶液为什么A.B.不行?3.氢氧化钠溶 H+浓度相同的等体积的两份溶液A和B;A为盐酸,B为醋酸,分别与锌反应,若最后仅有一份溶液存在锌,且放出的氢气的质量相同,则下列说法的是:A` 反应所需要的时间B>AB、 开始反应时的速率A>BC` 反 请帮忙翻译一下 O(∩_∩)O谢谢but it may be a good chance for you to get the start on others.i suggest you place a trial order first. you know it's the early bird that catches the worm. 问:( )do you（)of a（）?答:I(）it.英语句型,求,望十分钟内有答!问:( )do you（ )of a（ 答:I( ）it.线索：手表问:( ）( ）your sister( ）of a( 答:( ）( ）it.线索：围巾 已知进气风量为7500m3/h 进气温度为170℃ 进气成分为空气重量为4266kg/h ；水（此时为水蒸气）1000kg/h ；表面活性剂 3kg/h HNO3 4.8kg/h ； HF 0.1kg/h 进风为负压2600Pa 现在要加水冷却到90° 进水条件为 i think it unwise for either of us to be inflexible.什么句型 求详解 Reynolds,(Renault S.A.) is a French car maker,vehicle type production of small cars,car,SUV... 根据句意同所给单词的适当形式填空,使句子完整.通顺1.The little girl ____(be)probably simlar to most other students.2.Tom always _______(brush) his teeth after getting up.3.my panrents ______(watch) television after dinner.4.sandy 新东方走读班需要准备什么?第一次去新东方,报的北京的走读班,住的地方离教室蛮远得..内个听课证上中午只有半小时休息,怎么吃饭?他们送午餐?还有,有去过的麻烦分享下体验 根据句意,用方框内所给单词的适当形式填空,使句子完整、通顺arrangement,discovery,contect,view,protect,copy,quality,vest1.The man only wore a _______ while others wore coats on such a cold day.2.It is not good for us students _ 请帮忙翻译一下 O(∩_∩)O谢谢it seems to me that we‘ve come quite a long way,but there are still a few points left over to clear up 用be supposed to do sth句型造十个句子 请问一下有没有这个句型:don't be afraid to do sth如果有,那我再想问一下 为什么要有个be?希望能解释清楚一点~ be designed to do sth 是个固定句型,但为什么下面的句中 有两个 be this computer is being designed to tell you how to reach your destination.这个句中 第一个 is 代表什么 和 第二个 being 代表什么 为什么不可以直 帮我检查一下我写的英语作文有没有什么问题Do you perfer staying in a place all your life?My answer is:Of course not.Our life is interesting,which is filled with a myriad of different things.We live in this big city.We do many things 帮我检查一下我写的英语作文.Natioan Day is coming.I plan to go to Lushan for vacation with my parents.I'm gong to Lushan by train.We will stay there for three days.We're gong hiking.We are climbing mountains,and watching the sunrise.A gre 帮忙检查一下我写的英语作文2008 Olympic Games will conduct in Beijing,Regarding each Chinese,That is make peopel be proud an and proud thing ,I am one middle school student,For welcoming Olympic Games,I will study well,Courtesy treat othe explain why a production possibility frontier might shift outwards.a PPF might shift inwards. 根据英语提示填单词 R____(to get something given)It's better to give than to _____to get something given recive 为什么? David is a t---------- and s---------- boy.横线里要填一个单词,怎么填啊She is our new c-----.Sammi is David's c------.All of my friends are very p------ and h-------.请回答横线上的问题， A,B,C是大家熟悉的且与生命运动密切相关的三种化合物,它们所含元素不超过三种,并有如下转化关系：其中D也是日常生活常见的有机化合物,在一定条件下可与单质甲进一步发生如下变化：D+3 David is a clever boy,and he learned seven languages since 1981.那里错了,请说明那里和改正. 什么是Production_contract_curve? 高一化学问题求助.在线等.短周期的三种元素X、Y、Z,原子序数一次变小,原子核外电子层数之和是5.X元素原子最外电子层上的电子数是Y和Z两元素原子最外电子层上的电子数的总和；Y元素 原 为什么不能用碳酸钠除二氧化碳中的氯化氢 介绍自己所在的社区,或自己喜欢的社区写一篇英语作文,要大家听得懂.范文：My name is Linda.I live in Yushancun.It is a quiet community.There are many old people living here.Many families with young children live here,too.t 用 to be 句型的现在时和过去时介绍你小时候和现在的不同的作文 五句 pre-production sample in a case that any defect in a pre-production sample is foudn Pre-shipment inspection 和 During Production Inspection 这个验货,都是验什么内容啊 , 对于全局变量的由来还不太能搞清楚.这里就拿$pre来请教一下.全局变量$pre是数据表的区分符,但我一直找不到他是在哪里定义的.我能想到的思路是这样的：1.应该有一个表单,其中有一个文本