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  3. Public goods are those commodities from whose enjoyment nobody can be (41)

Public goods are those commodities from whose enjoyment nobody can be (41)

游客2025-03-27  56
问题     Public goods are those commodities from whose enjoyment nobody can be  (41)  excluded. Everybody is free to  (42)  the benefits of these commodities, and one person’s utilization  (43)  the possibilities of anybody else’s enjoying the same goods.
    Examples of public goods are not  (44)  one might expect. A flood control dam is a public goods. Once the dam is built, all the people living in the area will benefit  (45)  their own contribution to the construction cost of the dam. The same  (46)  true for highway signs or aids to navigations. Once a lighthouse is built, no ship of any nationality can be effectively excluded from the  (47)  the lighthouse for navigational purposes. National defense is another example. Even a person who voted against military expenditures or  (48)  taxes will benefit from the protection afforded.
    It is no easy task to determine the social costs and social benefits associated with a public good. There is no practicable way of  (49)  drivers for 100 at highway signs, sailors for watching a lighthouse, and citizens for the security provided to them through national defense.  (50)  the market does not provide the necessary signals, economic analysis has to be substituted for the impersonal judgment of the market place. [br]
选项 A、charging
B、estimating
C、calculating
D、controlling
答案 A
解析 根据上下文，可能的意义是：因为……而收取费用。charge句型：charge sb．some money for sth．因为……而收取某人多少费用。B项estimating译为“估计”；C项calculating译为“计算”；D项controlling意为“控制”。
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