(1-2﹚﹙2-3﹚﹙3-4﹚……﹙2011-2012﹚的结果是多少
题目
(1-2﹚﹙2-3﹚﹙3-4﹚……﹙2011-2012﹚的结果是多少
答案
每项都为-1,有2011个,即为奇数,故结果为-1
举一反三
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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