what is the best reason of using the Internet at school?这句话哪里有错
题目
what is the best reason of using the Internet at school?这句话哪里有错
答案
What is the best reason (for) using the Internet at school?
★ reason for sth/doing sth
例:have adequate/sufficient reason for doing sth 有充分的/足够的理由做某事
★ reason to do sth
例:We have good reason to believe that he is lying.我们有充分的理由认为他说谎.
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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