一、问题的提出京杭大运河是世界上开凿最早、里程最长、工程最大的运河。运河南端的杭州 ,享有“鱼米之乡”“人间天堂”的美誉。如今的杭州段运河可不再像往日那样风光无限。浑浊的河水掺着刺鼻的腥臭 ,河面上泛着一层闪亮的油污物 ,还时不时地漂来一些垃圾。随着人民素质的 First, the problem proposed Beijing-Hangzhou Grand Canal is the world’s earliest, longest mileage, the largest project of the canal. At the southern end of the canal, Hangzhou enjoys the reputation of “land of fish and rice” and “paradise on earth.” Today’s Hangzhou canal is no longer as glorious as it used to be. Turbid rivers are pungent with pungent odors, and there is a layer of shiny oil on the river, and some garbage is floating from time to time. With the quality of the people