急求关于夏天的英语短文,大一水平的英语作文就成.150字左右.
题目
急求关于夏天的英语短文,大一水平的英语作文就成.150字左右.
答案
Summer is the second season in a year. It is between spring and autumn. The sun of summer is the hottest; the water of summer is the warmest; the places of interests in summer are the most crowded thr...
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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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