什么是有毒有害气体

When`the best time to visit chinese? I'm already forgotten____you put the dictionaryA.that where it was B.where it was that 为什么选B不选A I’ve already forgotten #where# you put the dictionary yesterday 改成强调句 After you have used the dictionary,please put it back( )it belongs.A.where B.to which C.what D.that 为什么不能选B?根据“217紫薇”的回答，B不也是对的吗 在美国考驾照笔试最常见的题目是什么(英语和中文) if you come across a word___meaning you have forgotten,please look it uo in the dictionary这里是whose,还是in which还是that或which AMC美国数学竞赛题干是用中文还是英文表达?或者中英文交叉?RT,考AMC8,英语不太好,以为AMC和IMC一样是中英文交叉就报了一个,后来听人说好像AMC是全英文试题,有点紧张, 这个地址怎么翻译成英文沈阳市铁西区建设东路43-1号17-0143-1，代表的是和谐大厦A座，17-01代表的是房间号这个顺序弄得我有点懵 毕加索英文名的拼法9点前要 谢谢了 “五”字的第二笔笔画名称是撇还是竖 及的第二笔的笔画名称是什么 “及”字的第二笔的笔画名称是（ ） 师字第二笔笔画名称是什么? I guess you have already seen it.我想你已经看过了.不对给我改下谢谢 乃的第二笔笔画名称是什么? 有Do you have one 那有do you have it么? 选择:I do not believe you have already finished reading the book.-I ___ it to you this morningA will lendB.was lendingc.had lentD.lent 我想问下英文名“肖恩”到底哪种拼法比较不错?我查了下一共有四种拼法,分别是SHAWN,SEAN,SHANE,SHUAN,到底哪种好一点呢? 求填标点!由远而近 河面映现的色彩不断变幻 火红 红黄 淡黄 层次非常分明 偶尔 远处的天边升起一两柱淡淡的炊烟 便会欣赏到 大漠孤烟直 长河落日圆 的美妙画面 求所有含O的英语单词,五到七个单词的.、、求含o的所有单词，五到七个字母的、、、、越多越好，不要o开头的、谢谢啊！ I have forgotten 和I forgot的 区别例如 How much does the course cost you?Sorry,I （have forgotten）.I'm afraid.练习册的答案是这个 但是想不通. It is an island which name I have forgotten.这句话哪里有错? The door is open.I have forgotten ____(open)it.适当形式填空 I did German at school but I have forgotten most of it.:为什么不能用learnt呢? I have forgotten you have been 英语翻译She was a _____ _____ an actress. 翻译英语；你觉得怎么样的亚洲女孩是漂亮的? 中国翻译英文怎么写 求教英文名 道耐尔的拼法 I have already/ already have 哪个对? I have already got it变为疑问句和否定句 i have already scanned it 这句话写的对么?还是应该 i have already scanned for it