Jim surfs the Internet twice a week 划线部分提问
题目
Jim surfs the Internet twice a week 划线部分提问
空 空 空 does Jim surf the Internet a week?划线部分是：twice.
We have a Chinese lesson on Monday ,Wednesday,Thursday and Friday.改为同义句
We have Chinese lessons 空 空 a week.
答案
How many times does Jim surf the internet a week
We have Chinese lessons four times a week.
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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