四氧化三铁是混合物吗

there is less air p__-___in nanjing then in beijing横线里应填什么 how to be how to be a hero明天考口语,没时间写英语稿,有没有朋友能帮忙写一篇,感激不尽!要求大概普通速度念一分钟左右...In your opinion,what makes a hero?What can we do to develop ourselves in order to become a hero one day. as.the.as,not.as,as的用法 not as...as... 请回答下列英语问题,需要详细的理由!1、How about ____ out for a walk?A.wentB.goC.goesD.going2、I don't like cartoons.They are _____kids.A.of B.toC.forD.with 如何让自己快乐起来How to be happy：生活英语视频附文本求解 请简要描述诗歌内容,在结合生活实际,表达你对交友和友情的认识.以：How to be a friend?为题,用英语 Mathematics ___the language of science.A:areB:are going to be C:isD:is to be理由哦 Mathematics __the language of science.A.is B.Mathematics __the language of science.A.isB.are going to beC.is to beD.are Maths is the language of science是什么意思 中国救援海外有何启示 为什么说中国共产党是两个先锋队 一个领导核心 三个代表 我想问下什么是境外?什么是境内?含义是什么?不好意思, 为什么有些人总是怕领导 两个先锋队是一个领导核心和三个代表 英语翻译If I get this role,I canfinally come to terms with this funny little muddle called Bart. 把甲、乙两个体积相等的物体放入水中,它们静止时的情况如图所示,下列说法中正确的是（求解答过程） My uncle does not have a computer.My aunt does not have a computer either合并成一句话 一个书架有上、下两层,上层的本书是下层的3倍,如果从上层拿出40本放入下层,两层本书就相同.原来上写两层个有多少本书?（方程解答） 空心球放在水中上浮还是下沉啥时候上浮,下沉, 还有问问关于浮力和密度的知识点总结,如何更好的做这类题! thankyou! 今晚要用..很需要你们的帮忙.要列式的.6.一个圆锥底面直径是6分米,体积是47.1立方分米,把这个圆锥从顶点处垂直切成完全相同的两块,表面积将增加多少平方厘米? 今晚要用..很需要你们的帮忙.要列式的.5.一个圆柱形的铁块高16厘米,如果把它锻造成底面直径相同的圆锥体,这个圆锥体的高是多少厘米? Jay is going to give a concert this weekend,wouldwould you like to gto with me?---- Of course,I'm _____ on his wondrerful performance.A.excited B.interested C.happy D.high 举在字典上有几页? 忱在字典几页 Street 有Street Dream 还有Street of Dream 英语词组中see eye to eye和get the hang It's unbelievable that such a well-dressed lady__be a thiefA.shallB.willC.shouldD.need 英语翻译 The comittee is awaiting a decision from the head of fice before it takes any action 求翻译 everyone,to,young,wants,be,beautiful,and连词成句