population of china is larger than ___ in africa
题目
population of china is larger than ___ in africa
the population of china is larger than ___ in Africa.
A any country B any other country C that of any country
选择哪一个?为什么?
答案
C——that of 指代前面的the population
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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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