darkness would make him cherish his sight,and silence would teach him the joys of sound
题目
darkness would make him cherish his sight,and silence would teach him the joys of sound
答案
这是海伦·凯勒（假如给我三天光明）里面的一句话
darkness would make him cherish his sight,and silence would teach him the joys of sound
黑暗将使他们更加珍惜光明；寂静将教会他们真正领略喧哗的欢乐……
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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