I have calculated that my tuition,re_ and some other expenses for the five years of my degree would
题目
I have calculated that my tuition,re_ and some other expenses for the five years of my degree would cost at least $4,500
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My bedroomI have a lovely bedroom.There is a big bed in my bedroom.Near my bed,there is a white table.The chair is next to the table.I do my homework on the table every day.On the table,you can see a ...
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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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