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英语
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A man ran 900 meters in 2 minutes.What was his speed in meters per second?
人气：381 ℃ 时间：2020-06-03 20:37:54
解答
翻译么?一个男的跑900m需要2分钟,那他的速度是多少米每秒?
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0.5x+2/5=80%一0.08
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