这是安吉拉第一次参加三英里募捐长跑,她发现这还是需要一点毅力的。事实上,她已经跑完两英里了,正当她看表时,她对自己说(气喘吁吁地):“我的平均速度只不过是一小时4英里,天哪,这次我想平均每小时跑6英里。我必须得快点了。”为了使整个长跑过程中她的平均速度是6英里/时,她在接下来的一英里中的速度应该是多少?解答:这和她跑多快毫无关系——即使用全世界纪录 This is the first time Angela participated in the three-mile fundraising long-distance race, she found that it still takes a little perseverance. In fact, she had run two miles already, and as she looked at the table, she said to himself (breathlessly): “My average speed is only four miles an hour, my God, this time I want to average I have to hurry up. ”" To get her average speed of 6 miles per hour throughout the long run, what should she be doing in the next mile? It does not matter how fast - that is, use the world record