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发布时间：2006-06-22 13:25     点击：

    (D) reasons for slowing technological development in light of environmentalist objections

    (E) technological innovations making it possible to achieve optimum allocation of resources

    18. The author cites air pollution from motor vehicles in lines 54-56 in order to

    (A) revise cost estimates calculated by including the costs of resources

    (B) evaluate legal methods used to prevent technological developments

    (C) give examples of costs not included in buyer-seller bargains

    (D) refute hypotheses not made on the basis of monetary exchange values

    (E) commend technological research undertaken for the common welfare

    19. According to the passage, transactions between private buyers and sellers have effects on society that generally

    (A) are harmful when all factors are considered

    (B) give rise to ever-increasing resource costs

    (C) reflect an optimal allocation of natural resources

    (D) encompass more than the effects on the buyers and sellers alone

    (E) are guided by legal controls on the development of technology

    20. It can be inferred from the passage that the author does NOT favor which of the following?

    (A) Protecting the environment for future use

    (B) Changing the balance of power between opposing interests in business

    (C) Intervening in the activity of the free market

    (D) Making prices reflect costs to everyone in society

    (E) Causing technological development to cease

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