my journey friend to school 作文
题目
my journey friend to school 作文
答案
I went to Beijing last summer holiday.My classmates and I flew there.First,we walked up the Great Wall.And we took photos of ourselves.Second,we visited the Palace Museum.We stayed there for only one hour.At last,we ate the Beijing roast duck.It was very delicious.I had a good time.I want to gothere again and again.
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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