my grandfather often reads some books after dinner改为同意句
题目
my grandfather often reads some books after dinner改为同意句
答案
您好,改成My grandfather often does some reading after dinner比较好因为原句中reads some books：读好多本书,是一个具体的概念. does some reading：读书、阅读.抽象的概念况且一般人也不可能在饭后（after dinne...
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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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