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It takes 5 people 5 hours to dig 5 holes.If we want to dig 100 holes in 100 hours.
How many people do we need?
人气:159 ℃ 时间:2020-05-11 10:12:50
解答
挖洞速度不变,所以还是5个人.答:We need 5 people.
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