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MRS培养基在倒平板后,该怎么保存?MRS培养基在倒平板后,该在什么环境中保存平板呢? 钟乳石和石笋是怎样生成的? mrs固体培养基配方 which country is the first to get to the day?翻译成中文 一天至少要喝几杯水? in which country was the 2010 World Cup held? MRS 肉汤培养基是什么 MRS培养基的配方 寻找浪费时间的格言老师布置的作业,多多益善. 请教一下关于MRS培养基的问题请问各位高手,根据MRS培养基的成分一一配制好后,它的pH值一般是多少?当要用它来分离乳酸菌和纯化乳酸菌时,MRS培养基的pH值又该各调到多少?小弟在此先谢谢各 在测定空气中的氧气含量的实验中,若将红磷换成炭粉,实验不能成功,想要成功,事先加入什么呢? 弯管生锈后又没有快速打磨的办法 英语翻译翻译 it is the first time tim has ever been to another country. Before you go to another country,you must know the language and some of the culture of ...Before you go to another country,you must know the language and some of the culture of the country中文意思是什么? 请问1米水柱的压力怎么计算 请问地球是不是大体积行星? 行星体积计算公式想用来计算行星密度 “我昨天在商场买了一瓶可乐”英语怎么说?（是塑料瓶大瓶的那种） 塑料瓶中放蜡烛如何防止塑料瓶燃烧我想做一个生日小制作,在镂空的普通塑料瓶中放上蜡烛并点燃,在夜晚也很漂亮,可是我担心塑料瓶会不会燃烧?如何防止燃烧? The USA is a large country__many different dialects are spoken.为什么用in which? "The USA is a large country in which many different dialects are spoken."为什么用in which The USA is a large country ___ many different dialects are spoken.这地点壮语引导词能省略吗? which country has a_____(large)population,the USA or Canada? CD盒是什么材质的?是哪种类型的塑料?PPN是啥? which language is spoken by the most people in the world 英语初级小问题 which language is spoken by the most peop英语初级小问题which language is spoken by the most people in the world?为什么不说成which is language spoken by the most people in the world? 为什么1摩尔NH3含有10摩尔质子 english is spoken in so many countries,making it a university language all over the world 同义句english is spoken in so many countries,____ ____it a university language all over the world. 零点一摩尔碳中含多少个质子 若取金刚石和石墨混合物共1 mol在O2中完全燃烧,产生热量为Q kJ,则金刚石和石墨的物质的量之比为多少?设金刚石和石墨分别为a和1-a mol,燃烧时放出热量分别为395.41a kJ和393.51(1-a)kJQ = 395.41a + 393. 1 mol石墨和1 mol金刚石谁的能量高 人的一生像什么,这样类似的名言名句是什么?