do you think it possible for the North pole to have ___a few thousand years from now?Ashanghai
题目
do you think it possible for the North pole to have ___a few thousand years from now?Ashanghai
Ba shanghai Cthe shanghai Done shanghai要选哪个,为什么,答案是第二个,
答案
B
有一个上海,潜在的意思是a city like shanghai,像上海一样的城市,是泛指,所以用不定冠词
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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