it is said that they are to hold a boat race on the river outside their university.
题目
it is said that they are to hold a boat race on the river outside their university.
为什么用are to 而不是用were about to
答案
还没发生 陈述的事实 据说什么 are to 相当于 are going to 是打算 即将
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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