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18.（68） The value of a product is determined by the ratio of its quality to its price. The higher the value of a product, the better will be its competitive position. Therefore, either increasing the quality or lowering the price of a given product will increase the likelihood that consumer will select that product rather than a competing one.
Which of the following, if true, would most strengthen the conclusion drawn above?（WHY NOT A ）
(A) It is possible to increase both the quality and the price of a product without changing its competitive position.
(B) For certain segments of the population of consumers, higher-priced brands of some product lines are preferred to the lower-priced brands.
(C) Competing products often try to appeal to different segments of the population of consumers.
(D) The competitive position of a product can be affected by such factors as advertising and brand loyalty.（E）
(E) Consumers’ perceptions of the quality of a product are based on the actual quality of the product.
这题没人问，可能是比较简单，但我还是做错了，丢人，看了E最初觉得跟题目没啥关系，因为以为加强就该加强结论，后来问了个高手，说E加强了题目得题干，把E取非，那么整个结论就没依据了，想问下这种说法对不对？假如对，那取非题是否也有类似情况，取非提干，未必对结论取非？因为目前脑子里得知识点还是没总结清楚，甚至没想到要用取非去检验加强，以为取非只用于假设题，所以还望NN指教，万分感谢  | 
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发表于 2006-2-23 01:46:00
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