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由某气态烃和气态单烯烃组成的混合物,其平均相对分子质量为22.5,取在标准状况下的此混合气体4.48L,通入溴水中,结果溴水增重2.1克,通过计算回答：1,混合气体由哪两种烃组成?2,他们的体积比 在很久以前中国人不懂英语,英国人不懂中文,他们怎么交流?翻译怎么产生的? 连词成句:to,his,what,go,does,park,friend,time,the(?) 求翻译 英国人比中国人更喜欢吃肉 China rank ( )in the 2008 Beijing Olympic Games and more and more countriesChina rank ( )in the 2008 Beijing Olympic Games and more and more countries ( )China as a friendly and powerful country .A.the first rank B.first rank C.the first regardD.firs as china joined WTO ,english become a more useful and important t_____ 求关于春节的作文《令我感动的一件事》要求800以上 请问reality TV show是什么?不需要字面意思的翻译,需要具体的解释.是等同于食人的大罪吗? TV TV show可数吗急 tv top 【lady gaga】她曾为布兰妮等写过哪些歌呢啊? she goes to the park by taxi on weekend的问句怎么写 1__________she often _______________to the zoo?Not very often.A(Did,go)B(Dose,go)c(Does,goes)2How__________he go there?He went there by plane.A(do) B(does )C(did)3Mom went to HangZhou and ________my grandparents last weekend.A(visit)B(visits)C(visite 有哪些tv show 电视节目用英语 可不可以是TV show 谁知道关于理想的语段? 好语段!关于梦想,青春. 物极必反是什么意思 物极必反中的寓意是什么?为什么事情到了一定的极端,就会顺其作出反效果其中有什么规律与寓意 控制植物开花的三要素 请举个例子说明不要摘录网上的原话请结合自己的话来说物极必反 的意思 物极必反的意思 Lucy often __her mother.So her mother is often __with her.A.annoys annoyed B.annoyed annoyed C.annoies annoying D.annoys annoying My favorite TV show is "out look Eglish"以这个为题材写!thank you!随便怎么样都好!只要有范文!就是什么题材都Ok! 请以 My favorite TV show 为题 ,写一篇文章,词数为60左右 关于春天的散文不少于800字, 关于春天的散文(有图片的)快今天要恳求等待. 关于生命的美好的演讲稿600字 怎么写一个“让生命更加精彩”的演讲稿? 英语语法 Please allow me to introduce myself for you 检查Please allow me to introduce myself for you.My name is xx,my 20-year-old,was born in Qinghai Province.Very honored to have this opportunity to come here to interview.Now I will briefly in 有的演讲稿或议论文吗?急用