英语翻译
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英语翻译
3、昨天晚上,Amy和她妈妈买了什么?4、上周末,他们在公园玩什么?5、我们昨天没有上英语课.急需……求）
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1.What did your father do yesterday?2.He watched TV and did some sports.3.What did Amy and her mother buy yesterday night?4.What did they play in the park last weekend?5.We didn't have English classes...
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已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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