一、试题设计阅读材料,回答下列问题。成都平原,自古是我国重要的粮油产地。岷江历史上曾是一条“野性”河流,对成都平原危害严重。公元前251年,为了军事需求,秦国蜀太守李冰及其儿子访察水脉,对岷江进行了治理,修建了著名的都江堰工程,并制定了“深淘滩、低作堰”的岁修原则。“深淘滩”即内江河床要挖深,但不能过深,“低作堰”即飞沙堰堰顶宜低作,不宜过高。都江堰工程已于2000年被联合国教科文组织列入 First, the test design reading materials, answer the following questions. Chengdu Plain, ancient China is an important grain and oil producing areas. The history of the Minjiang River was once a “wild” river, which harmed the Chengdu Plain severely. In 251 BC, in order to meet military needs, Li Bing, the governor of the Qin State and his son visited the water mains and conducted management of the Minjiang River. The famous Dujiangyan Project was constructed and a principle of “old school, low school weir” was established . “Deep scouring beach ” Neijiang riverbed to dig deep, but not too deep, “Low for weir ” that is, weir weir weir should be low, should not be too high. Dujiangyan project was listed by UNESCO in 2000