标题: 逻辑10 [打印本页] 作者: 寂寞的自由 时间: 2003-11-1 05:33 标题: 逻辑10 14. An electric-power company gained greater profits and provided electricity to consumers at lower rates per unit of electricity by building larger-capacity more efficient plants and by stimulating greater use of electricity within its area. To continue these financial trends, the company planned to replace an old plant by a plant with triple the capacity of its largest plant.The company's plan as described above assumed each of the following EXCEPT: (A) Demand for electricity within the company's area of service would increase in the future.(B) Expenses would not rise beyond the level that could be compensated for by efficiency or volume of operation, or both.(C) The planned plant would be sufficiently reliable in service to contribute a net financial benefit to the company as a whole.(D) Safety measures to be instituted for the new plant would be the same as those for the plant it would replace.(E) The tripling of capacity would not result in insuperable technological obstacles to efficiency. 虽然说，D是正确答案，我通过排除法可以得到，但是如果单纯看D，而不采取排除法，怎么考虑D是假设的例外呢？谢谢大家作者: kathy72 时间: 2003-11-1 09:13
将D取非, 并不能削弱结论. 安全措施不同,可以采取另外一种嘛, 只要安全就不影响新项目的实施. 而且,文章结论是关于成本收益, 削弱或加强的方向均应与成本收益有联系,否则就是无关选项.