请以“Never Give Up”写一篇英语作文.
题目
请以“Never Give Up”写一篇英语作文.
答案
Mike used to be a very naughty student.He seldom paid anttention in the class and always lazy to do his homework.Therefore he did not do well in his study.His parent often angry with him because he fa...
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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