[求助]og-139.OG-145

emilie

139题不理解选b的原因，看不大懂选项的意思；
145题选a是怎么推导出来的呢？
多谢啦！

jerry_link

139 A.正常的失业水平很少被超过
      B.失业通常不会集中在人口地理分布的一些区段 （如果会集中，那么一个人若不在这个区域内，他可能50个认识的人里一个失业的也没有，所以必须做这个假设）
      C.知道别人失业的人的数量占到人口的90%以上
      D.R没有故意歪曲他所说的统计数据
      E.了解到一个认识的人失业所产生的对失业的恐惧要大于了解到失业的统计数据所产生的恐惧

jerry_link

145.题干表达了，占据率的上升不是因为申请入住的人多了造成的

而A正好说明占据率的上升是因为居住的这些人的平均时间长了造成的

emilie

3Q3Q very much!

Ivy2004

139

(B) unemployment is not normally concentrated in geographically isolated segments of the population

可以这样理解吗: 失业并不集中在特定的区域,如果集中在特定的区域,那么S所说的:50个认识的人里有2.5个人失业的情况就可能只发生在特定区域,而不一定适用于全部的区域.

由此证明失业不能集中在特定区域.

Andrea625

145. Between 1975 and 1985, nursing-home occupancy rates averaged 87 percent of capacity,
while admission rates remained constant, at an average of 95 admissions per 1,000 beds per
year. Between 1985 and 1988, however, occupancy rates rose to an average of 92 percent of
capacity, while admission rates declined to 81 per 1,000 beds per year.

If the statements above are true, which of the following conclusions can be most properly
drawn?
(A) The average length of time nursing-home residents stayed in nursing homes increased
between 1985 and 1988.
(B) The proportion of older people living in nursing homes was greater in 1988 than in
1975.
(C) Nursing home admission rates tend to decline whenever occupancy rates rise.
(D) Nursing homes built prior to 1985 generally had fewer beds than did nursing homes
built between 1985 and 1988.
(E) The more beds a nursing home has, the higher its occupancy rate is likely to be.

是A

summersmile

Questions 138-139 are based on the following.

Roland: The alarming fact is that 90 percent of the people in this country now report that they know someone who is unemployed.

Sharon: But a normal, moderate level of unemployment is 5 percent, with 1 out of 20 workers unemployed. So at any given time if a person knows approximately 50 workers, 1 or more will very likely be unemployed.

139.

Sharon's argument relies on the assumption that

(A) normal levels of unemployment are rarely exceeded

(B) unemployment is not normally concentrated in geographically isolated segments of the population

(C) the number of people who each know someone who is unemployed is always higher than 90% of the population

(D) Roland is not consciously distorting the statistics he presents

(E) knowledge that a personal acquaintance is unemployed generates more fear of losing one's job than does knowledge of unemployment statistics

B is the best answer.

Sharon’s argument assumes that people are generally similar in how likely they are to have among their acquaintances people who are unemployed. Since heavy concentrations of unemployment in geographically isolated segments of the population would produce great differences in this respect, Sharon’s argument assumes few, if any, such concentrations. Choice B is therefore the best answer.

1If normal levels of unemployment were exceeded relatively frequently, and if Roland’s figure of 90 percent were an exaggeration, Sharon’s argument would be unaffected, so choices A and D are incorrect. 2At exceptionally low levels of unemployment, Sharon’s argument suggests that choice C is likely to be false, so C is not assumed. 3The fear of losing one’s job is not part of Sharon’s argument, so choice E is incorrect.

我明白C项错了，但不明百ets关于C项的解释？

vipguest

我也不清楚C错在哪里，大虾可以指点一下吗？

whoami2

帮忙顶，我也看不懂 139题 C 选项的解释

whoami2

我澄清一下我的问题。139题C选项的OG解释，说

At exceptionally low levels of unemployment, Sharon’s argument suggests that choice C is likely to be false, so C is not assumed

翻译过来，就是说：当失业率特别低的时候，根据S的观点，选项C是错误的，所以选项C不是S的（观点的）假设。

我的问题1：这里关键是S的观点是什么？是他的计算方法？还是他的每50人里有1个或以上失业？

我的问题2：C选项是错了，但错误类型是什么？是逻辑无关? 还是选项取非仍然成立？