化学防倒吸装置

Jack is his father and Bob are his brother哪个是错的应该是什么 Jack is hie father and Bob are his brother.错在哪里还有Tom and i am good friends. take a short shower 为什么 Take short showers shower 后要加s同上 Take a short shower and try to take a cold one when the weather gets warm.求翻译~ give and take 小女神花铃 要一个英语好的人啊~ we used to take the same bus and we （ ） chat together括号中填一个情态动词,要有分析过程, 英语 people can chat while drinking tea.While的前面要加逗号吗?while是怎么用的 尼罗河是世界最什么的河,其流向为自什么向什么 尼罗河是一条怎样的河 尼罗河是由哪三条河流组成的 This bookshelf is (Kate's and Mary\ Kate and Mary's)如题,是选Kate's and Mary还是Kate and Mary's This is Kate's and Lucy' room这句话对吗 This is________room A,Jack and Linda B.Jack and Linda's C.Jach's and Linda's D.Jach's and LINDA 剑桥少儿英语口语面对面怎么打不开是光盘 give to和give for的区别把什么什么给什么人用哪个,有什么区别? tell 和say,give to和 give for有什么区别? give for和give to的区别并写例句, Every now and then和once in a while完全一样嘛? You wait for ages for a bus, and then three come along at once是什么意思 once upon a time before now is now and then is now .是什麼意思 And once that problem is gone then the dream will stop. 尼罗河在埃及境内长多少? 英语从句:We thought ___ strange that Tom did not come yesterday.填什么?为什么? We thought it strange that Xiao Wang did not come yesterday.请问这里的strange是形容词还是副词 The little girl looks pretty,doesn't she?does和is有什么区别? 根据首字母完成单词：Everyone knows that the t______ accident happened to Tom yesterday. Does和Is的区别 英语4选1（does&is）The man you want to see has arrived._____ he come now?A.Does B.Will C.Shall D.Is我选了D 指出下列主谓句的主语、谓语、宾语.1.莎莉文老师把我搂的更紧了2.老师告诉我许多新鲜事3.我高兴得泪流满面4.一望无际的戈壁滩没有一根草 分析尼罗河成为世界水量最大的河流的原因 尼罗河、刚果河流经哪些气候期,哪条河流水量较小,水位变化大欧洲的