牛津小学英语6b unit3A部分的中文和英文
题目
牛津小学英语6b unit3A部分的中文和英文
老师又要求背了.麻烦帮我打一下.
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Mr Smith comes from Australia. He lives in Nanjing now. He wants to visit the History Museum, but he doesn't know how to get there. He is asking Yang ling how to get there. Mr Smith:Excuse me, can you...
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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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