电子书超过纸制书的现象有哪些,用英语给我讲讲
题目
电子书超过纸制书的现象有哪些,用英语给我讲讲
答案
The electric books can reduce the use of paper in order to protect the environment.
The electric books can make people spend less money reading more books.
The electric books can enrich the electric books market.
The electric books can save the room where paper books are placed.
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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