写一封关于中国交通的信,写给老外的!(英文)
题目
写一封关于中国交通的信,写给老外的!(英文)
答案
Dear Principal:I was 5 years 5,the students were XXX,the school every day across the main entrance to which the only thing less than 4 meters in channel 4 times,and forth to school time is also the ti...
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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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