每天都能收到这样的好文章！
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与老年朋友们共勉！
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最后给大家出道小学生的数学题，试试您60秒之内能否做出来！
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你能否根据下图
求出桌子的高度吗？
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从以下5个答案中选取：
A)110cm B)120cm C)130cm D)140cm E)150cm
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