Reading the "South-to-North Water Diversion Project Drawing", I answered: (1) The South-to-North Water Diversion Project means that the water resources rich in _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Reading the "South-to-North Water Diversion Project Drawing", I answered: (1) The South-to-North Water Diversion Project means that the water resources rich in _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ (1) The South-to-North Water Diversion Project refers to the diversion of the abundant water resources in the Yangtze River system to North China and Northwest China, which are seriously short of water. The project is divided into three water diversion routes: east, middle and west.

(2) The east route of the South-to-North Water Diversion Project is to use the Beijing-Hangzhou Canal as a water conveyance channel to cross the Yellow River in Henan Province and finally transfer the water to Beijing and Tianjin. The water systems along the route include the Yangtze River, Huaihe River, Yellow River and Haihe River.

(3) The middle route scheme starts from the Three Gorges Water Conservancy Project on the Yangtze River, passes through Danjiangkou Reservoir on the Han River, the largest tributary of the Yangtze River, passes through Hubei Province and Henan Province along the way, crosses the Yellow River, and reaches Beijing via the North China Plain.

(4) Besides the South-to-North Water Transfer Project,

(5) The reason for the serious water shortage in North China is that there is less precipitation in North China, and the seasonal variation of precipitation is great. North China is developed in industry and agriculture, with dense population and large water demand.

(6) D is the "Yellow River Diversion Project", which introduces Yellow River water to Qingdao.

(7) The main advantage of the east route scheme of South-to-North Water Transfer Project is that it can use the existing river channel, namely the Beijing-Hangzhou Canal, to deliver water.

Therefore, the answers are: (1) the Yangtze River; North China; Northwest;

(2) Beijing-Hangzhou Canal; Henan; Huaihe River; Yellow river;

(3) Three Gorges; Danjiangkou; Henan; Taihang; North China; Third;

(4) build reservoirs to save water and prevent water pollution;

(5) There is less precipitation in North China, and the seasonal variation of precipitation is great. North China is developed in industry and agriculture, with dense population and large water demand.

（6）B；

（7）C．