用英语写一封信给你的笔友,告诉他你的寒假生活.字数150字左右
题目
用英语写一封信给你的笔友,告诉他你的寒假生活.字数150字左右
答案
Dear Tom ,I had a great winter vacation .I went to Beijing with my family .We stayed there for a week.Beijing is really a beautiful city.The weather was sunny .We went to the Great Wall ,the Summer Pa...
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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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