There will be many new computers in the future.改为一般现在时和一般过去时
题目
There will be many new computers in the future.改为一般现在时和一般过去时
答案
There are many new computers now
There were many new computers in the past
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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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