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题库 / Prep2007E1-CR-28
First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models. Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
If the statements above are true, which of the following is most strongly supported by them?
PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
PXC's production costs for its computers were lower last year than they had been the previous year.
原文：（price和profits）第一次购买的人＜二次购买的人（replacing their computers）。数量没变，利润增加，说明二次购买的人多了，第一次购买的人比例少了。看清楚问题，which of the following is most strongly supported by them?就是由原文得出结论。
正确D，去年首次购买PXC电脑的比例比前年有所下降。【很简单，不该错】错选C，由原文是不能得出竞争者情况的！
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