2. 外语
  3. Since the 【21】______ of the National Environmental Policies Act in 1969, the United States Congress, legislature at the fede

Since the 【21】______ of the National Environmental Policies Act in 1969, the United States Congress, legislature at the fede

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问题      Since the  【21】______    of the National Environmental Policies Act in 1969, the United States Congress, legislature at the federal level, has  【22】______    a series of laws designed to prevent the air and water pollution and to  【23】______    noise. At the same time, legislatures at the state  【24】______    have also been active in this area, and many states have laws that are similar to the federal laws.  【25】______   ,a state law must not conflict with a federal  【26】______    or  【27】______    an unreasonable burden on interstate commerce.
   The city of Burbank in California adopted an ordinance  【28】______    the nighttime takeoffs of jet aircraft between 10 p.m and 7 a.m. Lockheed owned and operated the Burbank Airport. It  【29】______    Brubank to prevent the enforcement of the ordinance.
   The judgment is  【30】______    Lockheed. The federal government of the United States has passed laws  【31】______    aviation and noise in the federal Aviation Act of 1958 and the Noise Control Act of ]972. Such legislation preempted the field and  【32】______    state action, because  【33】______    regulations would place an unreasonable burden on interstate commerce. If each airport had its own landing time  【34】______   , it would be very difficult to plan flights. Moreover the bunching of flights to  【35】______    local curfews would produce even greater noise and would increase the danger of  【36】______    by increasing traffic  【37】______   . From the nature of aviation  【38】______   , a single national control was essential. As a local regulation, the  【39】______    prohibiting nighttime takeoffs adopted by the City of Burbank was  【40】______    declared illegal.
【21】
选项 A、enforcement
B、enhancement
C、enjoyment
D、engagement
答案A
解析 本题考查上下文理解。这句的意思是：自从1969年《全国环境政策法》实施以来，美国国会(联邦级的立法机关)已经采取了一系列的法律来防止空气和水污染，并减少噪音。题目给出的四个选项形似，意思却都不同。因此，只要搞清楚每个词的意思，问题就容易解决了。enforcement指“实施”；enhancement指“加强，增强”；enjoyment指“享乐”；engagement指“订婚，约会”。
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