2.3 Reading for Writing（重点练）-2020-2021学年高一英语十分钟同步课堂专练（人教版2019必修第二册）

重点练 I. 阅读选择 The Colorado River is the lifeblood of the American Southwest. It supplies water to more than 36 million people, has changed the desert into farmland, and allows cities like Los Angeles, Phoenix, and Las Vegas to develop. But satisfying the region's need for water has come at a price. The river once traveled all the way from Colorado's Rocky Mountains to the Gulf of California. Now, dams control the river's water for human use. As a result,the river no longer reaches the ocean. Without water,the delta(三角洲）at the river's mouth has become dry and poor. To bring the delta back to life, engineers recently opened the Morelos Dam near the US-Mexico border to free a temporary burst of water. This pulse flow allowed the Colorado River to reach the sea for the first time in16 years, helping the river's delta come alive. The dams built by the US government form a system of man-made lakes. These lakes can store four times the river's yearly flow. "The lakes are like the river basin's