Where do their father work?还是Where does their father work?
题目
Where do their father work?还是Where does their father work?
It's 6 o'clock in the morning.He .(填gets up 还是is getting up),
答案
Where does their father work?正确的,主语是第三人称单数,所以用does构成特殊问句
is getting up现在早晨6点,他在起床
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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