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  3. Water projects in the United States gained a new principle in the 1930’s. And during this time the nation suffered its worst eco

Water projects in the United States gained a new principle in the 1930’s. And during this time the nation suffered its worst eco

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问题     Water projects in the United States gained a new principle in the 1930’s. And during this time the nation suffered its worst economic depression and the Great Plains region suffered its worst (36)______ in recorded history. As the economy (37)______ into a deep depression and (38)______ rates increased, the political climate for direct federal government (39)______ in water projects  improved. President Franklin Rooseveh’s first 100 days in office brought a (40)______ of new laws to deal with the (41)______ economic depression.
    The natural pattern of the Tennessee River was (42)______ by large spring flows that produced (43)______ floods and low summer flows that inhibited navigation. (44)____________.
    To counter these natural obstacles, the Tennessee Valley Authority Act of 1933 created the Tennessee Valley Authority (TVA), a public agency with broad powers to promote development in the region, including the authority to build dams and reservoirs and to generate and sell hydroelectric power. (45)____________. The TVA inherited the Wilson Dam, and by the beginning of the Second World War it had completed six additional multipurpose dams with power plants and locks for navigation. Investments in dams and hydropower facilities within the Tennessee Valley also received high priority during the war. (46)____________. The NIRA also gave the United States President unprecedented powers to initiate public works, including water projects.
  
选项
答案This organization used its authority to transform the River into one of the most highly regulated rivers in the world within about two decades．
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