A gust of wind swept the bed off the roof ang sent it crashing into the courtyard below
题目
A gust of wind swept the bed off the roof ang sent it crashing into the courtyard below
句中为什么是crashing而不是crsh
答案
因为只有 send sth to do和send sth doing的搭配.to do是将要做.doing是正在进行.
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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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