It is hard to --------that the sun is about one hundred and fifteen million kilometers away,very far
题目
It is hard to --------that the sun is about one hundred and fifteen million kilometers away,very far away from us
在横线上填个词,开头字母是b
答案
believe
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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