逻辑贴重开，重新开始啦···

橘子骨头

有问题大家可以在此问啊，大家一起讨论。我尽量以最快的速度解答。我不是NN，但是逻辑还不错，呵呵，兑现我回馈CD的诺言。


----------------------------------------半年分割线-------------------------------------------------------------
之前为申学校，毕业论文，实习，各种诡异的事情忙着。以至于，一直荒废了CD，只回答了那些单独给我发邮件的同学的问题。现在一切都忙完啦，暑假刚好帮朋友复习GMAT，就顺便把逻辑贴重开了吧。只要上线就会回答问题，晚上可以在线讨论。不是NN，但是大家一起讨论应该思路会开阔很多哈哈。
杀鸡成功啦···
哈哈··

橘子骨头

我自己顶一下啦·····大家重新来讨论吧。

一起备受折磨··嘿嘿··

shunliqumeiguo

跪求07prep解答!!!

57.    (34655-!-item-!-188;#058&007580)

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.

Sharon's argument is structured to lead to which of the following as a conclusion?

(A) The fact that 90% of the people know someone who is unemployed is not an indication that unemployment is abnormally high.
(B) The current level of unemployment is not moderate.
(C) If at least 5% of workers are unemployed, the result of questioning a representative group of people cannot be the percentage Roland cites.
(D) It is unlikely that the people whose statements Roland cites are giving accurate reports.
(E) If an unemployment figure is given as a certain percent, the actual percentage of those without jobs is even higher.

答案A, 好混乱哦。。。能解释下不？

橘子骨头

骨头哥~~~我要疯掉鸟~ 旧Prep-cr整个做完正确率才60%~平均每道还1分51！啷个整嘛，收命啊！！！！我要加你，挨到问啊~

-- by 会员 森然 (2010/10/25 12:00:04)

我把邮箱留下来吧 cathyhu19(在) gmail.com 最近在外面，上网不是很方便。只能用手机登一下CD。看到这个回复的同学可以一起发邮件给我，我尽快答，恩，攒RP

zmh0011

Frobisher, a sixteenth-century English explorer, had soil samples from Canada’s Kodlunarn Island examined for gold content.  Because high gold content was reported, Elizabeth I funded two mining expeditions.  Neither expedition found any gold there.  Modern analysis of the island’s soil indicates a very low gold content.  Thus the methods used to determine the gold content of Frobisher’s samples must have been inaccurate.
Which of the following is an assumption on which the argument depends?

A.    The gold content of the soil on Kodlunarn Island is much lower today than it was in the sixteenth century.
B.    The two mining expeditions funded by Elizabeth I did not mine the same part of Kodlunarn Island.
C.    The methods used to assess gold content of the soil samples provided by Frobisher were different from those generally used in the sixteenth century.
D.    Frobisher did not have soil samples from any other Canadian island examined for gold content.
E.    Gold was not added to the soil samples collected by Frobisher before the samples were examined.

请问B,D为什么不对，答案是E

winow

lz真是好人，问一道prep哈，我想破了脑袋。。。。

14.    (26835-!-item-!-188;#058&002982)

The higher the level of certain vitamins and minerals in the bloodstream, the better a person's lung function, as measured by the amount of air the person can expel in one second.  The lung function of smokers is significantly worse, on average, than that of nonsmokers.  Clearly, therefore, one way for smokers to improve their lung function is for them to increase their intake of foods that are rich in these helpful vitamins and minerals.

Which of the following is an assumption on which this argument depends?

(A) Smokers are less likely than nonsmokers to have diets that are rich in vitamins and minerals.
(E) Smoking does not introduce into the body chemicals that prevent the helpful vitamins and minerals from entering the bloodstream.

答案是E，我后来想想E也能想明白，但是A呢？

我的理解是smoker吃的维他命少（前提），所以肺更加不好（原文的中间结论），所以应该多吃点（原文结论）

有的时候做的急了，看到A直接选上去了，都看不到E选项了。。。。

-- by 会员 bmathhcx (2010/10/25 16:26:53)

这个题我做过，文章说，正是因为smoker肺不好，所以通过多吃来弥补。所以应该假设是肺不好不影响吸收。这样的话，多吃点就会补偿肺功能的缺陷。

bmathhcx

lz真是好人，问一道prep哈，我想破了脑袋。。。。

14.    (26835-!-item-!-188;#058&002982)

The higher the level of certain vitamins and minerals in the bloodstream, the better a person's lung function, as measured by the amount of air the person can expel in one second.  The lung function of smokers is significantly worse, on average, than that of nonsmokers.  Clearly, therefore, one way for smokers to improve their lung function is for them to increase their intake of foods that are rich in these helpful vitamins and minerals.

Which of the following is an assumption on which this argument depends?

(A) Smokers are less likely than nonsmokers to have diets that are rich in vitamins and minerals.
(E) Smoking does not introduce into the body chemicals that prevent the helpful vitamins and minerals from entering the bloodstream.

答案是E，我后来想想E也能想明白，但是A呢？

我的理解是smoker吃的维他命少（前提），所以肺更加不好（原文的中间结论），所以应该多吃点（原文结论）

有的时候做的急了，看到A直接选上去了，都看不到E选项了。。。。

森然

48.  (34221-!-item-!-188;#058&007550)

Parasitic wasps lay their eggsdirectly into the eggs of various host insects in exactly the right numbers forany suitable size of host egg.  If theylaid too many eggs in a host egg, the developing wasp larvae would compete witheach other to the death for nutrients and space.  If too few eggs were laid, portions of thehost egg would decay, killing the wasp larvae.

Which of the following conclusionscan properly be drawn from the information above?

(A) The size of the smallest hostegg that a wasp could theoretically parasitize can be determined from thewasp's egg-laying behavior.

(B) Host insects lack any effectivedefenses against the form of predation practiced by parasitic wasps.

(C) Parasitic wasps learn fromexperience how many eggs to lay into the eggs of different host species.

(D) Failure to lay enough eggswould lead to the death of the developing wasp larvae more quickly than wouldlaying too many eggs.

(E) Parasitic wasps use visualclues to calculate the size of a host egg.

OA：A。为什么不选D呢？我觉得同类抢资源打架不会赶尽杀绝啊，最多就是长得胖和吃得不好的区别。被HOST反虐绝是要灭口的啊~

55.  (34557-!-item-!-188;#058&007575)

According to the TristateTransportation Authority, making certain improvements to the main commuter railline would increase ridership dramatically. The authority plans to finance these improvements over the course offive years by raising automobile tolls on the two highway bridges along theroute the rail line serves.  Although theproposed improvements are indeed needed, the authority's plan for securing thenecessary funds should be rejected because it would unfairly force drivers toabsorb the entire cost of something from which they receive no benefit.

Which of the following, if true,would cast the most doubt on the effectiveness of the authority's plan tofinance the proposed improvements by increasing bridge tolls?

(A) Before the authority increasestolls on any of the area bridges, it is required by law to hold public hearingsat which objections to the proposed increase can be raised.

(B) Whenever bridge tolls areincreased, the authority must pay a private contractor to adjust the automatedtoll-collecting machines.

(C) Between the time a proposedtoll increase is announced and the time the increase is actually put intoeffect, many commuters buy more tokens than usual to postpone the effects ofthe increase.

(D) When tolls were last increasedon the two bridges in question, almost 20 percent of the regular commutertraffic switched to a slightly longer alternative route that has since beenimproved.

(E) The chairman of the authorityis a member of the Tristate Automobile Club that has registered strongopposition to the proposed toll increase.

OA：D。我A了...为神马啊？

56.  (34605-!-item-!-188;#058&007579)

Crops can be traded on the futuresmarket before they are harvested.  If apoor corn harvest is predicted, prices of corn futures rise; if a bountifulcorn harvest is predicted, prices of corn futures fall.  This morning meteorologists are predictingmuch-needed rain for the corn-growing region starting tomorrow.  Therefore, since adequate moisture isessential for the current crop's survival, prices of corn futures will fallsharply today.

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

(A) Corn that does not receiveadequate moisture during its critical pollination stage will not produce abountiful harvest.

(B) Futures prices for corn havebeen fluctuating more dramatically this season than last season.

(C) The rain that meteorologistspredicted for tomorrow is expected to extend well beyond the corn-growingregion.

(D) Agriculture experts announcedtoday that a disease that has devastated some of the corn crop will spreadwidely before the end of the growing season.

(E) Most people who trade in cornfutures rarely take physical possession of the corn they trade.

OA：D。我又A了。。。

59.  (34753-!-item-!-188;#058&007583)

A certain mayor has proposed a feeof five dollars per day on private vehicles entering the city, claiming thatthe fee will alleviate the city's traffic congestion.  The mayor reasons that, since the fee willexceed the cost of round-trip bus fare from many nearby points, many peoplewill switch from using their cars to using the bus.

Which of the following statements,if true, provides the best evidence that the mayor's reasoning is flawed?

(A) Projected increases in theprice of gasoline will increase the cost of taking a private vehicle into thecity.

(B) The cost of parking feesalready makes it considerably more expensive for most people to take a privatevehicle into the city than to take a bus.

(C) Most of the people currentlyriding the bus do not own private vehicles.

(D) Many commuters opposing themayor's plan have indicated that they would rather endure traffic congestionthan pay a five-dollar-per day fee.

(E) During the average workday,private vehicles owned and operated by people living within the city accountfor twenty percent of the city's traffic congestion.

OA：B。我E了~  

Thx~~
另外想问一下：怎么才能提高CR部分啊？不计时正确率相当高，一计时就当场死菜了。。怎么办啊~

森然

骨头哥~~~我要疯掉鸟~ 旧Prep-cr整个做完正确率才60%~平均每道还1分51！啷个整嘛，收命啊！！！！我要加你，挨到问啊~

winow

关于BF题，我自己也说不出个确切地解决方法，不如你把邮箱给我。我有一个九道句子作用题的分析，很有用··

-- by 会员 橘子骨头 (2010/10/24 21:46:13)

269699823(AT) QQ.C0M
太谢谢你啦