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三角恒等式有哪些公式 Beijing is the place where I was born 为什么不直接I was born in Beijing呢?用where,好处是什么? 数学必修4三角恒等式公式Asinα+Bcosα怎么转换成Asin(α+β） They are playing football on the grass.这句话哪里有错 雅思和托福怎么训练听力的? 用have to造句 用所给的短语造句have tohave a tryin front oflook at It was the place where I was born.请问这句话中the place和where 可以省略其中的任意一个吗? the place where i was born.把这个句子还原成陈述句是什么啊 帮个忙 ［］to clean your room before you sleep.括号填remember还是remembered?或者别的? Remember to clean your desk before beginning to study同义句 Remember to l_______your bike .It's not safe here I remember to bring your bike here,but I can't find it. 找出错误 急~~~ I remember to bring your bike here,but I can't find it.改错 ______are the boys?-------they are playing football in the playground A.where B.what C.how_______TV every evening?----yes ,but now he_____to______musicA.is e watching;listensB.does he watch;is listeningC.is he watch;is listeningdear peterhow are you? I am playing football (in the playground.)对括号里提问 There are five ___people in the city Amillions B.million of c.millions of D.million 用have get to 造句必须有中文 Tieling is the place___Zhao Benshan was born in.A.where B.which连接词在从句中作宾语还是状语呢? 已知α、β均为锐角,且cos(α+β)=sin(α-β),求tanα的值. 【高一数学】三角公式的应用问题》》》cos^2(a+b)=1/[1+tan^2(a+b)]写出公式的转化过程,抱歉，sec没学过，答题中无法用这个进行化解。 the population of the city_ works?-_of the population of the city_ works?-About 60 percentA.What,isB.What,areC.How much,isD.How much,are选了C,想问问为什么捏? 75.A third of the population of the city _______ their own cars.A,has B.have C.had D.is我选择A,1/3嘛,不到1.结果错了... 猫为什么那么调皮? 求一篇介绍网球王子的英语作文! 求四级仔细阅读sectionB第二篇答案,要带选项内容的不要沪江网校版,有哪位大神找见带选项内容的答案了啊,那是第一篇，大哥…要62到66的 为什么刚考完的四级的详细阅读SectionB的答案还没有出?有谁有真题的?如题~要的是真题~有的朋友请发出来看看~ would you like to play the piano? I'm going to play football,would you like to j______ me?Yes,I'd like to. Would you like to play ping-pong with me?A.No,thank you B.I want to play C.Yes,I'd like to应该选哪个,求原因同意怎样说?不同意又应该怎样说 have to 怎么造句 ...have to...造句求have...to...的造句,两句