一种小汽车的速度可以达到每小时180千米，比一种超音速飞机慢八分之七，超音速飞机的速度是多少

为什么是in fact而不是in facts 化简cosa +sina*tana-seca数学问题 sec2A-sec2A×（secA)^2×(sinA)^2-(tanA)^2 化简 make后面什么时候加动词原形什么时候加过去分词 make后面是加动词原形吗 如图31题 what are the ideas of these birthday foods?是什么what are the ideas of these birthday foods? 世界上最帅的男人 I ( ) the girl playing.A.see B.look C.read D.watch What the date today?改错 Do you ()newspapera in the evening?A.read B.see C.watchThat will ()fun!A.is B.are C.be What () Mike going to do this evening?A.does B.is C.are make 后加动词什麽形式 There was a police next to him讲解一下next to him 我是不是世界上最帅的男人? The apples in the box mine. A.is B.be C.have D.Are 求英语高手划分句子结构,具体分析一下句子,谢谢!President Obama has promised to do whatever is necessary to protect Americans abroad as protests against a film seen as insulting to Muslims spread to US diplomatic missions across the 做肯定回答:Did there be a heavy rain in Beijing yesterday afternoon?请简要地回答 how,is,old,Nancy 英语连词成句拜托了 The girl behind _____(he)is Nancy. 分析一个句子结构（关于as well as）.John plays football as well as ,if not better than Davird.John若不比DACIRD更好,也和他一样好.是我抄错了吗?若不是,那as well as 后面省略宾语是什么结构? 有什么英语课外读物是一页是英文另一页则是中文的?最好是文章,容易买的,多介绍几本额!呵呵… 学高中英语最好的途径是什么?背单词?背课文?题海?看英文读物?还是其他?（我英语成绩从小学就一塌糊涂,到底怎么办才能有效地提升成绩?另注:我对数理化生兴趣高且成绩好,做了高考难度的 mike's house is behind his school.的同义句 把God helps those who help themselves改为if引导的条件状语从句 It is no use telling him not to worry.为什么tell不加不定式啊 His house is ____ ____ (在……对面)his school. "亟"这个字怎么念? 第35题的句子结构 是什么句型 his sister studies very hard 改为同意句his sister is 什么/ 改同义句they both study very hard2her hair is longer than emma3my sister is hard working4art is not as important as chemistry5little tom plays chess well急快 一什么耳朵?用什么词啊? The man in a hat is my father? 为什么不能用wear a hat呢? wear a hat和 in a hat 有什么区别呢? 1.Si和C的熔点如何比较2.电子形成过程如何表示3.join in与take part in 是否相同