Ben often visits Jim.改一般疑问句、否定句、划线提问.划线部分是visits Jim
题目
Ben often visits Jim.改一般疑问句、否定句、划线提问.划线部分是visits Jim
答案
Ben often visits Jim.
改一般疑问句：Does Ben often visit Jim?.
否定句:Ben doesn't often visit Jim.
划线提问:What does Ben often do?
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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