电脑被偷之后第一次问问题。。。

xyc19901015

前几天寝室被人破门而入了，夺走了陪伴我两年不到的本本，各种伤心悲愤。。。但生活任要继续，只有吸取教训并化悲愤为力量才是强者！
令人稍感宽慰的是最近我的逻辑正确率有了提高，阅读上手后也觉得比刚开始看要清楚多了（我一开始打算复习阅读的，但当时水平有限，力不从心，遂从语法开始），所以希望继续给力，争取暑假就能考出来！
大全-2-18.    Lark Manufacturing Company initiated a voluntary Quality Circles program for machine operators. Independent surveys of employee attitudes indicated that the machine operators participating in the program were less satisfied with their work situations after two years of the program’s existence than they were at the program’s start. Obviously, any workers who participate in a Quality Circles program will, as a result, become less satisfied with their jobs.
Each of the following, if true, would weaken the conclusion drawn above EXCEPT:
(A) The second survey occurred during a period of recession when rumors of cutbacks and layoffs at Lark Manufacturing were plentiful.
(B) The surveys also showed that those Lark machine operators who neither participated in Quality Circles nor knew anyone who did so reported the same degree of lessened satisfaction with their work situations as did the Lark machine operators who participated in Quality Circles.
(C) While participating in Quality Circles at Lark Manufacturing, machine operators exhibited two of the primary indicators of improved job satisfaction: increased productivity and decreased absenteeism.
(D) Several workers at Lark Manufacturing who had participated in Quality Circles while employed at other companies reported that, while participating in Quality Circles in their previous companies, their work satisfaction had increased.
(E) The machine operators who participated in Quality Circles reported that, when the program started, they felt that participation might improve their work situations.
正确答案是E。但我想知道我选的C和conclusion有什么关系吗？
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Black Americans are, on the whole, about twice as likely as White Americans to develop high blood pressure. This likelihood also holds for westernized Black Africans when compared to White Africans.
Researchers have hypothesized that this predisposition in westernized Blacks may reflect an interaction between western high-salt diets and genes that adapted to an environmental scarcity of salt.
Which of the following statements about present-day, westernized Black Africans, if true, would most tend to confirm the researchers’ hypothesis?
(A) The blood pressures of those descended from peoples situated throughout their history in Senegal and Gambia, where salt was always available, are low.
(B) The unusually high salt consumption in certain areas of Africa represents a serious health problem.
(C) Because of their blood pressure levels, most White Africans have markedly decreased their salt consumption.
(D) Blood pressures are low among the Yoruba, who, throughout their history, have been situated far inland from sources of sea salt and far south of Saharan salt mines.
正确答案是A。我选的是D，这道题我是完全不能理解为什么选A。。。望赐教！谢过

sdcar2010

For number 2:

Answer A "The blood pressures of those descended from peoples situated throughout their history in Senegal and Gambia, where salt was always available,  are low", confirms that when their genes adapted to the abundance of salt, black and white Africans do not have high blood pressure. This finding removes the possibility that black Africans are genetically prone to have blood pressure regardless of the availability of salt in their diets for their ancestors.

sdcar2010

For #1:
Conclusion: any workers who participate in a Quality Circles program will, as a result, become less satisfied with their jobs.

You are asked to find 4 answers weaken the above conclusion and one has no impact on or stengthen the same.

C says that during the training, machine operators exhibited two of the primary indicators of improved job satisfaction. If this is the case, the workers become more satisfied with their job, which weakens the conclusion drawn above.

D says that some worker actually increased their work satisfaction while participating in Quality Circles, albeit in another company.  This is a direct rebutal to the above conclusion, which does not limit itself only to Qaulity Circle at Lark Manufacturing.

xyc19901015

不愧是黑侠，碉堡了！感谢~

xyc19901015

但是A选项里并没有说people live in scarcity of salt的情况啊，他的hypothesis refer to interaction of both two factors，应该说的是一种交集的情况吧。。。

sdcar2010

#2 question.

Premise: The black tend to have high blood pressure than the white.
Conclusion: This unique disposition might reflect an interaction between western high-salt diets and genes that adapted to an environmental scarcity of salt.

We are asked to find a strengthen.

One potential alternative explanation is that the black are genetically disposed to have high blood pressue. If so, the conclusion falls apart.

Choice A says the alternative explanation is wrong, thus A is a strengthener.

xyc19901015

懂了！谢谢sdcar！

irenejz

thanks sscar, i didn't understand this question until i saw your post