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怎样学鬼步舞 墨西哥旅游 去古巴 墨西哥旅游需要带什么日常用品 由钾和氧元素组成的某混合物中,含钾的质量分数为78/126,其中混合物中只有O2 2-（过氧离子）和O2 -（超氧离子）两种.此晶体中,O2 2-和O2 -的个数比为 chemistry question!Explain the following observations.a.Gases but not solids can be compressed easily.b.A liquid expands more when heated than an equal volume of a solid.Please answer my questions in english!tks A chemistry questionExplain why chlorine is a gas at room temperature 墨西哥的地理特征（不要一大堆文字、就两三个词语就可以了）.结合气候和资源分布来回答、谢谢、 墨西哥好吗? 怎么去墨西哥 Organic Chemistry SOLOMONS 10th的pdf电子书 Lucy has a round face,but Lily has a long face 合并为一句无 Lucy has a round face.Lily has a long face合并成一句：Lucy and lily____ ____. Lucy has __(long) hair than Lily 两种元素组成的物质是混合物吗 由MgSO4,MgSO3两种物质组成的混合物,经测定混合物中含硫元素质量为28%,则混合物中氧元素的质量分数是——求过程(∩_∩) 有机化学第五版影印版答案《organic chemistry》L.G.WADE,JR.高等教育出版社的 来人啊 救救我吧 请发至邮箱45324870@qq.com in the in the end还可以等于什么,写全点 There is alake in the park.用river作选译问句 we'll have ____ ___holiday .我们将有一次八天的假期 这两个是什么离子的符号? 河里有个男孩：There is a boy in the water,怎么不是river? 英国概况:In London,West End is usually the place for______? in the end 1.I have worn out my shoes,so Iwant to buy a new() ____in my present work,I would be quite willing to do what you ask me to正确答案是哪个A.If I am not engaged B.It I don 't engageC.Were I not engaged D.Didn't I engage 我这只黑白条纹的鱼是啥鱼 are you willing to work without any reward?请问面试时用英语怎么回答? wear me out是啥意思 wear out在不同意思时各是什么性质的词组? Mary says that the shoes I bought yesterday______ easily .A are worn outB is worn out C wear outD wears out 答案选c为什么不选a用被动呢 wear myself out是啥子意思?