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我们给出如下定义：若一个四边形的两条对角线相等，则称这个四边形为等对角线四边形．写出你所学过的特殊四边形中是等对角线四边形的两种图形的名称____ ．
They use computers to keep the traffic________smoothly.
— How are you today, Kate?— I feel even now. I don't think this medicine is good for me.
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