it has no meaning to one who is not in good health 和 making ourselves busy at work helps much in kee
题目
it has no meaning to one who is not in good health 和 making ourselves busy at work helps much in keeping good health .
答案
it has no meaning to one who is not in good health :这对身体不健康的人来说毫无意义.making ourselves busy at work helps much in keeping good health：让我们忙于做事情会对保持身体的健康很有作用....
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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