Unit 4 reading 导读及单元答案 2020-2021学年牛津深圳版B本七年级下册英语课件（含听力MP3)

Dujiangyan irrigation system: creating a land of plenty The Dujiangyan irrigation(n.灌溉) system(n.系统) in Chengdu is a world-famous system for managing water. It was built in 256 BC by Li Bing, a Qin State's engineer. At the time, it was one of the largest engineering projects(项目) in the world. This wonder of engineering was added to the UNESCO World Heritage(n.遗产) List in the year 2000. Before the Dujiangyan irrigation system was built, people who lived near the Min River often experienced(v.经历，遭受) terrible(n.严重的) floods(n.洪灾). Li Bing studied this problem carefully and came up with(提出) a clever way to fix it. He decided(n.决定) to change the course of the river. With the help of (在...的帮助下)his son, Li Bing built a system that controlled(v.控制) the flow of the river. The system reduced(n.减少) the water level in areas at risk(n.风险) of flooding. It also directed(v.引导) excess(adj.过量的) water to farm fields that needed it. By controlling the supply(n.供应量) of water that reached crops, Li Bing created(n.创造) one of the world's earliest irrigation systems. The system brought wonderful benefits(n.利益) to the people of Chengdu. It not only stopped the floods, but also greatly increased(n.增加) food production(n.产量) on farms. For this reason, Chengdu has since become known as a“land of plenty(n.充裕，许多)”. The Dujiangyan irrigation system remains in use today, over 2,000years after it was first built. Remarkably(adv.非凡地，了不起地), it still works exactly as Li Bing planned it to. 重点句子 1 This wonder of engineering was added to the UNESCO World Heritage List in the year 2000. 这一工程奇观于2000年被列入了联合国教科文组织世界遗产名录。 UNESCO World Heritage List表示“联合国教科文组织世界遗产名录” 2 Before the Dujiangyan irrigation system was built, people who lived near the Min River often experienced terrible floods. 都江堰水利工程建造之前,住在岷江边的人们常遭受严重的洪灾。 who lived near the Min River是定语从句,修饰people。 3 By controlling the supply of water that reached crops,Li Bing created one of the world's earliest irrigation systems. 通过控制对庄稼的供水量,李冰创造了世界上最早的灌溉系统之一。