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题库 / Prep2012-CR-63
Printwell's Ink Jet Division manufactures ink-jet printers and the ink cartridges they use. Sales of its ink-jet printers have increased. Monthly revenues from those sales, however, have not increased, because competition has forced Printwell to cut the prices of its printers. Unfortunately, Printwell has been unable to bring down the cost of manufacturing a printer. Thus, despite the increase in printer sales, the Ink Jet Division must be contributing less to the company's profits than it used to.
Which of the following, if true, most seriously weakens the argument?
Ink-jet printers in regular use frequently need new ink cartridges, and Printwell's printers only accept Printwell's ink cartridges.
Unlike some competing companies, Printwell sells all of its printers through retailers, and these retailers' costs account for a sizable proportion of the printers' ultimate retail price.
Some printer manufacturers have been forced to reduce the sale price of their ink-jet printers even more than Printwell has.
In the past year, no competing manufacturer of ink-jet printers has had as great an increase as Printweil in unit sales of printers.
In the past year, sales of Printwell's ink-jet printers have increased more than sales of any other type of printer made by Printwell.
background: Division制造打印机和墨盒
尽管打印机销量增加，打印机带来的销售额却降低因为打印机的单价降低了。所以divisin对于公司利润的贡献一定比以前少了。问weaken
choice a, 打印机经常要换墨盒，并且只接受原厂的墨盒。correct，profits来自两部分：打印机的和墨盒的。打印机销量低，但是墨盒销量高就可以弥补
premise部分压根提都没提cartridge，conclusion部分又牵扯了整个部门的profit，选项优先看提了cartridge的
这题还是错在没看懂，原来是在讨论打印机和墨的关系。原文说即便打印机销量上升，但是由于其单价的下降，打印机+墨这条产品线不会对利润有多大贡献了。A选项提到了墨是专用的，买打印机就必须用这种墨水，所以打印机销量上升，墨也上升，而且墨的价格又没有被限制。错选E，其实一般CR看到选项里拿过去某个事情做样本基本也是错，因为这种样本没什么代表性，有可能是特例。
conclusion说的是ink jet division (包括 ink printer 和 ink cartridges), 原文中只说了printer销量增加，单价下降，revenue下降，但是没提到ink cartridges, 所以不能说整个division 贡献less profit （有可能cartridge卖的很多利润高）
怎么逻辑这样考啊。。。题目都是陷阱，我直接选了d。。。脑补是问那个ink打印机贡献的利润少。。。这个怎么在做题的时候注意啊。。好焦虑
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