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英语翻译six trees are equally spaced along one side of a straigh

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英语翻译
six trees are equally spaced along one side of a straight road.the distance from the first tree to the fourth is 60 feet,what is the distance in feet between the first and last trees?
Students and staff can file through the doors at these rates approximately 55 per minute through the main door,30 per minute through the side door,and 25 per minute through the rear door.
Tome lived a quarter of his life as aboy
六棵树等距生长在一条笔直公路一侧,从第一棵树到第四棵树的距离是60英尺.第一与最后一棵树之间的距离是多少英尺?
学生与工作人员排成纵队行进的话经过55分钟能通过正门.经过30分钟能通过侧门,25分钟能通过后门.