prep1-28
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?
(B) 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. (C) 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. (D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year. (E) PXC's production costs for its computers were lower last year than they had been the previous year. 请教，为什么不是B呢？
A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
(B) 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.
(C) 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.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
(E) PXC's production costs for its computers were lower last year than they had been the previous year.
请教，为什么不是B呢？
(B) 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.
(C) 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.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
(E) PXC's production costs for its computers were lower last year than they had been the previous year.
请教，为什么不是B呢？
是不是B是充分条件但是不必要，它没有削弱以前的profit 也可以很高啊？
可是他都说了 larger ? 头疼，发现看这个题目的时候自己心里就有答案，所以一看到就不假思索的找他因。
文中没有对competitor进行过比较，又因为PXC的产品profit margins 和prices 没有变，所以A，E无关
D很好理解
但是我无法排除B，是无关选项么？
加油，加油
give me a favor? any one
恩，还有就是printers的利润，我也不知到，不能说它是导致profit上升的原因是吗？
加油，加油，不放弃，大家请赐教啊
你好 你没有写明题目要求 我估计这是一道解释题
原文指出 那些第一次买电脑同时买配件的人 他们得到的配件价格低 利润也低 当然是相比后买配件的人
你选择B可能是觉得去年后买配件的人增加了 因此利润上涨 这是你的主观臆断！
事实上B的题干并没有说明这些人是买电脑同时买还是之后买
因此完全可以理解为买电脑的同时买配件
这样与D所述效果相反
另外 给你个小建议 做题时脑子里不要有所谓的充分 必要思想 想想“有没有可能性”就行了
祝好运！
你好 你没有写明题目要求 我估计这是一道解释题
原文指出 那些第一次买电脑同时买配件的人 他们得到的配件价格低 利润也低 当然是相比后买配件的人
你选择B可能是觉得去年后买配件的人增加了 因此利润上涨 这是你的主观臆断！
事实上B的题干并没有说明这些人是买电脑同时买还是之后买
因此完全可以理解为买电脑的同时买配件
这样与D所述效果相反
另外 给你个小建议 做题时脑子里不要有所谓的充分 必要思想 想想“有没有可能性”就行了
祝好运！
对不起啊，题目类型没有贴：
question goes to :
If the statements above are true, which of the following is most strongly supported by them?
不好意思，你的解释我不同意，如果按照你的说法B的题干并没有说明这些人是买电脑同时买还是之后买
因此完全可以理解为买电脑的同时买配件
那么问题的意思就是 买电脑同时买电脑相关的产品，诸如：打印机..
可以由此得出去买电脑的人分成2种 A=只买电脑的人 B=买电脑同时有买电脑相关产品的人 电脑购买总人数=A+B
前提：总人数没有变
那么，前年 A 多 B 少， 而去年 A 少 B 多
而B中电脑相关的产品能够带来利润，不也可以支持原文所说的profit增加了吗？
models 在这里应该是指电脑中的一个系类 或者是型号吧，就像广汽丰田汽车系列: 凯美瑞（Camry） 雅力士（Yaris） 等
希望大家指出我的不足！谢谢拍砖
我的思路是错了 很抱歉 因为题目猜错
这是一道推理题 上支持下 不能用解释题的思路来做 推理题正确答案为：a.不能有原文未出现的事物 b.不能有原文未出现的绝对化用语（only、any) c.与原文方向一致
B项有原文未提到的事物computer-related products 所以要排除 如果是支持\削弱\解释 则不可轻易排除
期待与你的讨论！
同意推理：
原文的question 是：
如果以上的声明是正确的，那么下列哪个选项最强烈的支持？
可以不这么官方么，我对B的解释可以认为是对原文的支持么？
另外：推理是算conclusion 的一种么，那这么说是我把原文的问题看错了，我把它看成了support题型
期待您的回复，谢谢！
常见的推理题有4种：infer\conclusion\上支持下（如本题 题干中有个被动语态）\上true 下true（如果上面说的是对的 那么下面哪一个也是对的） 用同一个原则来做 就是刚才那提到的三原则 正如管老师所说“推理题是用排除法做出来的”
这题如果改成支持题 B也不是特别准确 因为文中说Last year PXC's profits from computer sales were substantially higher than the previous year 也没说 computer-related products算不算在内 有点模糊 但是方向对了 也沾边了 所以勉强算对
另外 关于解释\支持\削弱题的最高原则，和非充分性的思想 我在这几道题的评述中提到 欢迎指正
http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=373158&page=1
http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=373276&page=2
句尾的这句话：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.是最重要的，依靠这句话就可以排除C选项
If the statements above are true,which of the following is most strongly supported by them?
原来一看到Support就当成加强了……
仔细一看才是 支持选项…… 也就成了归纳题……
综合上面给出的条件，， 答案很明显就是D了~
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