同义句Great changes have taken place in my hometown over the years=1.My hometown2.There have
题目
同义句Great changes have taken place in my hometown over the years=1.My hometown2.There have
答案
1.My hometown has changed a lot over the years.
2.There have been great changes in my hometown over the years.
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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