一道百思不得其解的陈向东weaken题

wj37044

In a recent study, sedentary middle-aged men who drink more than two cups of coffee a day,
were found more likely than other sedentary middle-aged men to have a high blood level of cholesterol,
which is a factor increasing risk of heart disease.
Cholesterol can reach the blood from food and drink, but is not contained in coffee.

Which of the following, if true, most seriously weakens a conclusion from the study that for sedentary middle-aged men
coffee increases the risk of heart attack?

  A. A sedentary style of life increases levels of cholesterol in the blood.
  B. Coffee contains caffeine, which acts as a stimulant that increases heart rate.
  C. The men studied drank their coffee without milk or cream, which contain cholesterol.
  D. In both groups, the men were likely to be overweight, and excess weight is a factor that increases risk of heart disease.
  E. The men who drank more than two cups of coffee a day also ate more foods high in cholesterol.

答案是E, 但我觉得A和C也可weaken.

烦请高手指点!

lawyer_1

推理：A和B不同情况导致不同结论，所以，不同之处为结论的原因

只有E提出A和B不同之处

这是他因削弱

ujnzhoubing

个人解题思路:
这是一种论据推出结论的题型。
最直接的办法是削弱论据。

coffee 推出 heart attack.只要削弱论据coffee的作用就可以。

A选项根本和coffee不沾边。
C好像有加强推论的意思。
Ecoffee 推出 eat more food 而Cholesterol can reach the blood from food and drink。eat more food 推出 heart attack

huangyouhuifei

推理：A和B不同情况导致不同结论，所以，不同之处为结论的原因

只有E提出A和B不同之处

这是他因削弱

-- by 会员 lawyer_1 (2011/2/11 21:53:36)

题目倒是弄懂了，但没看懂lawyer的解释？望lawyer前辈指点~~~~

个人理解：
题目中做实验的两组人都是有sedentary习惯的，排除了A选项。
C排除了他因，不能削弱。
E说另有他因，削弱。

wj37044

多谢lawer,从两者不同推出一个他因,来削弱结论.

sdcar2010

This is a typical correlation vs. causation type of logical question.  If two things happen together, it could be:
1) A causes B
2) B causes A
3) C causes both A and B
4) C causes A while D causes B

For this question, if E is true, drinking two cups of coffee does not cause elevation in cholesterol level, let alone more risk in heart attack.

wj37044

This is a typical correlation vs. causation type of logical question.  If two things happen together, it could be:
1) A causes B
2) B causes A
3) C causes both A and B
4) C causes A while D causes B

For this question, if E is true, drinking two cups of coffee does not cause elevation in cholesterol level, let alone more risk in heart attack.

-- by 会员 sdcar2010 (2011/2/13 0:42:46)

请问这道题是属于你所列的那一种?

sdcar2010

Possibility 4.

wj37044

Possibility 4.

-- by 会员 sdcar2010 (2011/2/13 21:52:58)

谢谢,能否将情况4中的ABCD与此题联系起来解释下吗?

sdcar2010

A) sedentary middle-aged men who drink more than two cups of coffee a day,
B) The above coffee drinkers were found more likely than other sedentary middle-aged men to have a high blood level of cholesterol, which is a factor increasing risk of heart disease.

A) cause B) The conclusion from the study that for sedentary middle-aged men coffee increases the risk of heart attack.

D) Coffee drinkers ate more foods high in cholesterol.

D) causes B)