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西班牙语学习求助!p和b到底怎么发音最近越来越困惑,虽然能明显听出区别,但还是发不出来,有时可以不经意说出来但还是不习惯,书面上说的太笼统,求大神指教 生太阳要多少天 sin(x)的绝对值在0到nπ的定积分. sin绝对值定积分怎么积分 肼为什么是有机物?有机物中必须含碳么?现代汉语词典中却说肼是有机物,WHY? 明天哪个城市下雪 歌颂母爱的诗歌名句,要出处说说,越多越好 二苯碳酰二肼分光光度法有机物对 铬测定有影响,请问是如何影响的,原理什么呢,难道仅仅是因为有机物影响 求一个5*5矩阵对角线元素之和 圆c经过不同的三点A(-3,0),B(2,0),C(0,3),求圆的方程 现在什么城市在下雪,2月中旬还有什么城市会下雪 雅思口语怎么快速提高啊! [10] All flights _____ because of the snowstorm,we decided to take the train.A.were canceled B.had been canceled C.have canceled D.having been canceled 翻译包括选项,详细分析句子. All the flights ______ because of the snowstorm,we had to take the train instead.A.were canceled B.had been canceled C.having canceled D.having been canceled 1、All fights___off beacuse of the terrible weather,so they had to go there by train.A was called Bcalled C had called Dhad been called 给我准确答案 我语法基础不好 All flight__________because of the terrible weather, they had to go there by train. what letter is yuou call yourself快 what letter is you call yourself? what letter is you can yourself?用中文回答答案、 What letter is"you"是什么? 日晕三更雨,月晕午时风作者用了谚语这样的好处是什么 看云识天气 说说 日晕3更雨,月晕午是风.这则谚语表达意思 接歇后语：日晕三更雨—（ ）八只脚的螃蟹—（ ）九月初八问重阳—（ ） but i think i should give you more encourage! I think you should write more books.(改为否定句）________ _______ _______ you should write more books. 根据问句写答句 i think you should be more careful An old man died because of thr hot weather.death要转换成下列句式应怎么填呢 An old man ____ _____ ____ because of the hot weather. 肼、羟氨之类算不算有机物? 已知函数f(x)=sin(wx+φ)(w>0,-π/2≤≤π/2)的图像上的两个相邻的最高点和最低点两点间的距离为2√2且过点（2,- 1/2）,则函数f（x）= What did you call yourself"Nobody" for?(同义句） They had to ___the 800-meter race because of the bad weather.A.put on B.put off C.get on D.get up 请一一说明...O(∩_∩)O哈哈~谢谢! 太阳诞生的时候离现在有多久啊?