火灾时，为什么大量的有毒气体集中在房间上方

懂英语的进,根据题干要求,写出一篇120字的作文.1.Directions：For this part,you are allowed thirty minutes to write a composition on the topic “An Eye-Witness Account of a Traffic Accident”．You should write at least 120 words ac 英语三级分别有什么题及各题多少分? 世界上最难的字谜 求 What Are Words - Chris Medina 空间歌曲链接913774310@qq,com chris medina - what are words歌曲链接 Tom ___(call) us as soon as she arrives in Shanghai Mun asks Tom and me to help her.She wants( )to go shopping用人称代词的适当形式填空 she asks Tom to go to her country for a vacation When he was thirsty ,Tom decided to move to London.(同义句）At the _____ of thirsty ,Tom made a _____ to move to London. Look at Mary's c__and see what she is doing What are you doing,MeiMei?I am reading a letter ___ my pen pal.She is studying ___Japen. 232200邮政编码其中数字代表的意思是什么? 物理题!高手来,速度!不要太复杂不过要看的懂!某科学兴趣小组同学对物体的沉浮条件进行研究：在一个重4N,底面积为200平方厘米的圆柱体薄壁玻璃容器底部,放一个边长为10cm的正方体,然后逐 寻找物理大师,本科就差不多了.或者是懂很多的,交流借鉴相对论与量子力学方面,不算数,只是讨论. 都知道太阳能热水器外面有一排银白色的吸热管,可是黑色比白色吸热效果好,如果仅靠热传递对热水器里的水进行加热的话,为什么不用黑色的管子而用白色的呢?我很好奇希望真正懂的来回答 玩具制造 原材料有哪些 鸟的羽毛有什么特点 愤怒的小鸟羽毛怎么得 Where is he from?(改成同义句） 鸟的羽毛是什么形状? 描写鸟的羽毛 句子,急 where is he from?改为同义句 where________he_________? where is he from ? 怎么回答? where is he from 的中文意思是什么? ___ my visit to France,I arrive ___ Paris the first.A.At ,in B.On ,at C.During ,to D.In ,on they will arrive France the morning of July 28 填介词,希望来点解析. She will arrive______Paris______the morning of July A.at,in B.in,on C.in,in D.at,on 现代老人跟90后年轻人的想法有什么区别?现代的老人跟90后年轻人的想法有什么区别 Mary can speak French ____.She expects to travel in France when she grows up.A.correctly B.good C.well D.fluently根据题意A排除,B是adj.不能用,那C和D有区别么?这是道单选题. 英语翻译Well,it seems that if Washington had accepted the command of his army under this tree he must have done so on his knees.华盛顿为什么要接受他的军队的命令呀？怎么这么怪。on one's knee 是跪下的意思吗？ 跪求有关消费心理5000字英文文献以及中文翻译 100分! 英语翻译Valentine's Day:heart it or hate it?heart 有这种用法么?常见么?还有,再问下,desist from pining for your paramour for a