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  3. Salesperson: The picture tube is the central component of any television, and Picturesque televisions use the same high-quality

Salesperson: The picture tube is the central component of any television, and Picturesque televisions use the same high-quality

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问题 Salesperson: The picture tube is the central component of any television, and Picturesque televisions use the same high-quality picture tubes as those used in TruVue televisions. Since you pay a much lower price for a Picturesque, you pay a lower price for a television with the same picture quality when you buy a Picturesque instead of a TruVue. Which of the following is an assumption that, if justified, would allow the conclusion of the salesperson’ s argument to be properly drawn?
选项 A、TruVue televisions are much more widely advertised than are Picturesque televisions.
B、The picture quality of a television is determined solely by the quality of its picture tube.
C、A salesperson earns much less on the sale of each Picturesque television than on the sale of each TruVue television.
D、Many more Picturesque televisions are sold each year than TruVue televisions.
E、Picturesque televisions are assembled in the same factory that assembles TruVue televisions.
答案B
解析 本题前提与结论之间有明显的跳跃，前提为“Same high—quality picture tubes”，而结论为“Samepicture quality”，所以结论要想成立，必定要做一假设，把A与B联起来，即差异概念的桥梁。(B)将两个质量连了起来，因此(B)正确。
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