They were eager to show how light and shadow fell on objects at different times of day.
题目
They were eager to show how light and shadow fell on objects at different times of day.
为什么是day?不是a day?
答案
day翻译成白天,而a day 意思是一天
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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