圆周长公式的推导过程

Jane is and () girl.she is from uk.A (England)BJane is and () girl.she is from uk.A (England)B (American) C(English) Jane comes from Canada.But now she ____in China.可以用 is living吗 ＂腾讯视屏‘’的英语单词是什么 请过路高人谈一下must be doing 与 must have been doing 的用法.这是在新概念第九课出现的.这里的 must 换成 shall 、could 、can 等意义上有什么变化吗? you will always be the one/you have always been the one 请问这两句的区别是? 求关于科学方面的儿歌. 科技童谣 Have you seen him yet?--Yes,I have seen him ____.just还是already? 赞生活的童谣、赞科技的童谣急!一定要是童谣! 说科学童谣加油哟额 An idea came to her that she might do the experiment in another way是定语从句还是同位语从句一定要帮我 i had a new idea (revolving)in my mind around the plan in the coming year.为什么这里用ing形式,不用revolved 不是revolve sth.in one's mind而且有have sth.done 的结构 The idea for the new machine came to MR.Baker while he was devoted to his invention recentlyhe was devoted 可以改为devoting himself吗 如何翻译 The idea for the new machine came to Mr Baker while he was devoted to his invention. The idea for the new machine came to Mr Baker _______ to his invention.A.while he was devoted B.while devoting C.while devoting himself D.while devoted为什么选A 不选C , 急求2014年6月英语四级真题及答案（word版）, 为什么2014年6月有两套四级英语题?现在在我手上的题 听力开始是A) See a doctor about her strained shoulder.B) Use a ladder to help her reach the tea.但是我网上搜索四级听力音频却全是以1.M:Did you buy any of the s 谁有开头是The food in UK is very different from our Chinese food.People in the UK eat……的短文? 人们说的虎鞭牛鞭到底是什么?以前我一直以为是动物的尾巴``但好像不是`那如果不是动物的尾巴`那是什么呢? 有关科技的童谣 大学英语四级,2014年以前的题型,哪些属于客观题. 如果2014年大学英语四级过了,12月份可以再报6级吗? Chandler:I can't believe she can out run you man!Chandler这句话是不是有什么问题啊run是动词啊,OUT怎么能放在他前面呢 Don't believe in man请问这怎么翻译~哪个更准确啊~你们觉得 呵呵 Don,t believe a I believe in __idea that I shoud fight like __ man whateever trouble I face.A an,a B an,theC the,the D the ,a 锐角的定义到底是什么-30度这种角是不是锐角 朋友们.锐角三角形必有一个角是30度吗?如果不是那锐角有什么定义.麻烦你们讲解下谢谢. 锐角的定义是? PK和PS分别是哪两词的缩写?例如 XX和XX在PKPS(说明?注释?):. 壮夫缚虎的详细翻译 日本四国 九州 北海道三个岛的经济排名?哪个最发达,哪个最落后?