I was at home just now.___ ___ ___just now?
题目
I was at home just now.___ ___ ___just now?
还有一个
We did housework yesterday.
__ ___ ___ ___yesterday?
明天就要交了
答案
Where were you just now?
你刚才在哪儿?
What did you do yesterday?
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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