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求积分 ∫lntanx/sinxcosx dx 按括号内的提示,改写句子.1.There are three pilots in that tomn.(next year)2.He become a computer programmer last year.(in two months)3.The famous basketball player is twenty years old.(a month later)4.The pianist plays the piano every day.( 根据括号里的提示改写句子The boy is drawing a picture in the room.(对 is drawing a picture 提问.)___ ___ the boy ___in the room? 根据括号内的线索改写以下句子Eddie and Ben are good friends and they help each other.（保持句意不变） Eddie and Ben are good friends and they help_____ _____. spring to my home 是什么意思 He ate a quick breakfast and went to work.请大家翻译以下这句话,并重点解释a quick breakfast的含义, a quick breakfast 怎么翻译? Bai Lili has a quick breakfast and then d___ to work.D开头的单词,应该填什么啊? 极度恐慌一共多少幕?RT 关于极度恐慌我想知道剧情.不用太详细.只想知道那幽灵似的人的故事,我看解说那里都说她叫“L马”. 英语用英语怎么说? 做历史简答题有什么诀窍吗? 政治简答题的方法,总是答不到点怎么办? I don't eat much for___breakfast but this morning I had___big breakfastAa;aBa;/C/;/D/;a 电报山怎么样 一次数学测验,老师出了8道题,每对1到得3分,选错一道扣两分.小华刚答完题后,他得了9分,小刚答对几道 依要求改写句子大渡河水流湍急改为拟人句: 什么条件下,下列分式的值为零?（1）（x-1）/x （2）（5a-b）/（a+b） You'are old enough to _______ your own living.A.win B.obtain C.gain D.do 把句子反义疑问句补充完整 Everything begins to grow in spring,把句子反义疑问句补充完整Everything begins to grow in spring,____ ______? 15a^3b^2+5a^2b_____求过程. 求代数式的值:(x^2-2x)/(x^2-4)÷[-2-(2x-4)/(x+2)]其中x=2+根号2 求代数式的值(x^2-2x)/(x^2-4)÷(2x)/(x+2)+(x+2)其中x=1/2 把分式a^2/a+7b中的a和b都扩大三倍,分式的值why When will EU economy spring come?翻译在线等候~~~ (10a+3b)-3(a+b)-2(0.5a+b)计算 已知椭圆的方程为x^2/4+y^2/3=1,若椭圆的点P在第二象限,且 阅读下面两首唐诗,前不见古人,后不见来者,念天地之悠悠,独怆然而涕下（陈子昂《登幽州台歌》）空山不见人,但闻人语响.返景入深林,复照青苔上.（王维《鹿柴》）两首诗作者感受的都是 x+（x-1）+（x+1）+（x+10）+（x-10）=440 This morning I had eggs and milk ____ breakfast 填单词 已只椭圆的方程为x2/4+y2/3=1,若点P在第二象限,且角PF1F2=120度,求三角形PF1F谢谢了, what had you had for breakfast before you began morning classes this morning?自己回答.改为被动语态：People in different countries and different places of the world eat different kinds of things.我的钢笔掉进水里。my pen __ __ the w