in early summer,it is often rainy in shanghai改为同义句
题目
in early summer,it is often rainy in shanghai改为同义句
in early summer,()often () in shanghai
答案
it often rains in shanghai.这句是表示天经常下雨原句表示:天气经常是雨(预报天气里的”雨“)
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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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