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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
17
管理
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、efficiently
B、effectively
C、effectually
D、absolutely
答案
B
解析
effectively意为“有效地,能够产生效应地,实际上”。根据上下文只有此项可 选。A项efficiently意为“有效地,效率高地”。C项effectually意为“有效地,有法律效力地,全然”。D项absolutely意为“完全地,绝对地”。
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