摘要： ．解:设原计划每小时抢修的路线长为.根据题意.得 ··························· 5分 解之得 ·································· 7分 检验:是原方程的解.且符合题的实际意义． 答:原计划每小时抢修的路线长为400m．···················· 8分

网址：http://m.1010jiajiao.com/timu_id_4124827[举报]