We should often ______ our _____ and do some exercise to prevent the A/H1N1 flu.
题目
We should often ______ our _____ and do some exercise to prevent the A/H1N1 flu.
我们应当勤洗手.多锻炼,以预防甲型H1N1流感.
答案
wash...hands
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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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