GWD 7-17 想不通

gmatgmat

Of patients over 65 years old who survived coronary bypass surgery—a procedure widely prescribed for people with heart disease—only 75 percent benefited from the surgery.  Thus it appears that for one in four such patients, the doctors who advised them to undergo this surgery, with its attendant risks and expense, were more interested in an opportunity to practice their skills and in their fee than in helping the patient.

 

Which of the following, if true, most seriously undermines the argument?

 

1. Many of the patients who receive coronary bypass surgery are less than 55 years old.
2. Possible benefits of coronary bypass surgery include both relief from troubling symptoms and prolongation of life.
3. Most of the patients in the survey decided to undergo coronary bypass surgery because they were advised that the surgery would reduce their risk of future heart attacks.
4. The patients over 65 years old who did not benefit from the coronary bypass surgery were as fully informed as those who did benefit from the surgery as to the risks of the surgery prior to undergoing it.

The patients who underwent coronary bypass surgery but who did not benefit from it were medically indistinguishable, prior to their surgery, from the patients who did benefit.

答案是E, 我选D 怎么也想不通

gmatgmat

还有这个

Q30:

Printwell’s Ink Jet Division manufactures ink-jet printers and the ink cartridges 墨盒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 providing the company with much smaller than it used to.

 

Which of the following, if true, most seriously weakens the argument?

 

1. Ink-jet printers in regular use frequently need new ink cartridges, and Printwell’s printers only accept Printwell’s ink cartridges.
2. 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.
3. Some printer manufacturers have been forced to reduce the sale price of their ink-jet printers even more than Printwell has.
4. In the past year, no competing manufacturer of ink-jet printers has had as great an increase in unit sales of printers as Printwell has.

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.

为什么选a。 c为什么不行？

疯了疯了

逻辑狂错一大堆

yunhan123

我的理解：7-17:
选D没有起到削弱，反而有加强的意思。因为它说“没有受益的病人和受益的病人一样得到了手术风险性的告知”。既然没有受益和受益的病人从医院获得的信息完全一致，所以题干中所说医生练技能及想赚钱的结论就不成立了。
而E讲，没有受益的病人是因为医学上无法辨别造成的手术失败，不是医生个人行为。故削弱了题干中的结论。
Q30
选C一定错，属于无关选项。一些公司比P公司降更多的价，并不能削弱the Ink Jet Division must be providing the company with much smaller than it used to.部门为公司贡献的大小才是问题的关键。
A讲Printwell’s printers only accept Printwell’s Printwell’s ink cartridges.
        .从经商角度看，买消耗品更赚钱，对吗？所以虽然Printwell’s printers不赚钱了，但原来买了其打印机的及现在买了的都要使用Printwell’s ink cartridges，所以这个部分还能继续赚钱。故A 正确

gmatgmat

但是就算墨盒都赚钱了， 怎么知道他这个部分给公司的贡献就大了呢？

因为打印机在赔钱阿！墨盒挣的部分能弥补打印机赔的部分么？这个都没有说啊？

yunhan123

“Sales of its ink-jet printers have increased.” “ Printwell has been unable to bring down the cost of manufacturing a printer.”题目中并没有讲打印机在赔钱啊。

rorochen

我也是选C的，做的时候我想如果消费者利用打印机的次数不多，那也不用经常换墨水合， 那就算是卖墨水也赚不了钱~后来就选c了

ff7250

因为医学上无法辨别造成的手术失败怎么就削弱了题干中的结论？
就算不是因为医学上无法辨别，那些不成功的手术也不是手术之前医生就知道手术不成功还劝说病人动手术的吧？