英语作文my winter holiday
题目
英语作文my winter holiday
答案
During my winter vacation,I was very bored.Nothing seemed interesting,except for doing homework,watching TV or playing computer games.However,it was interesting at the last few days.I bought my lovely...
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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