初中英语日记20字左右
题目
初中英语日记20字左右
尽量有多篇
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1.Today and friends of foreign travel, outside air is very good, people feel very comfortable. We all appreciate the fine girls bicycles. We enjoyed the beautiful nature brought. We happily spent a ha...
举一反三
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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