小红、小丽和班上的“数学大王”小军到一个已经停工了的建筑工地上去玩,看到在一个圆柱形的水桶里盛有一些水。小红说这里应该有大半桶水,而小丽则不同意,说最多只有半桶,说不定还只有小半桶。她俩争执(zhí)不下时就去问小军,看他在没有别的工具的情况下是否有什么办法知道谁 Little Red, Mary, and the little math kings in the class went to a suspended construction site to see some water in a cylindrical bucket. Little Red said that there should be most of the barrel of water, but Mary does not agree, saying that only half a barrel, maybe only half a barrel. When she was in a dispute she asked the little army to see if he had any other way of knowing who had no other tools