My last week作文 50字
题目
My last week作文 50字
答案
I had a busy weekend .
On saturday morning .I cleaned my room .In the afternoon ,I did homework .It was a little difficult .On saturday night,I staied at home .my aunt cooked dinner for me .On sunday morning ,I went to library .I read a book about history .Then in the afternoon,I play soccer with my friends,on sunday night ,I watched TV ,I saw an interesting talk show.
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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