1.background information: all nations: place a high tax on income-->a negative incentive for technological innovation-->fall behind in the international arms race
Those nations that, through historical accident or the foolishness of their political leadership, wind up in a strategically disadvantageous position are destined to lose their voice in world affairs.
premise:a nation must allow its highest tax bracket to exceed 30% of income
conclusion:a nation maintains its value system and way of life.
where does the number 30% come from?
we don't know that when the tax of income is low, whether there will be a positive incentive for technological innovation
a strategically disadvantageous position & the fall behind in the international arms race~have something to do with each other?
好别扭的逻辑~看着不对却说不明白flaw在哪
(A) The top level of taxation must reach 45 percent before taxation begins to deter inventors and industrialists from introducing new technologies and industries.
--it's about taxes on income--irrelevant--weaken
(B) Making a great deal of money is an insignificant factor in driving technological innovation.
--more money-->more taxes--support--right
(C) Falling behind in the international arms race does not necessarily lead to a strategically less advantageous position.
--weaken
(D) Those nations that lose influence in the world community do not necessarily suffer from a threat to their value system or way of life.
--weaken
(E) Allowing one’s country to lose its technological edge, especially as concerns weaponry, would be foolish rather than merely a historical accident.
--the difference between the historical accidents and foolishness of their political leadership--irrelevant--right
完全错了~每天的精练都错呀
weaken the argument EXCEPT-->support the argument or irrelevant
这道题还是需要以后再做几遍！！！
2. Which of the following, if true, would it be most important to take into account in evaluating the result?
background information:Urban air contains more sulfur dioxide than does rural air, and plants in cities typically grow more slowly than do plants in rural areas.
premise:In an experiment to see how much of the difference in growth is due to sulfur dioxide, classes in an urban and a rural school grew plants in greenhouses at their schools and filtered the greenhouse air to eliminate sulfur dioxide.
conclusion:Plants in the urban greenhouse grew more slowly than those in the rural greenhouse.
whether there is other differences between the two kinds of air that influence the growth of plants?
(A) The urban school was located in a part of the city in which levels of sulfur dioxide in the air were usually far lower than is typical for urban areas.
--students have eliminate sulfur dioxide. the level of it is irrelevant
(B) At both schools, the plants in the greenhouses grew much more quickly than did plants planted outdoors in plots near the greenhouses.
--the result of the experiment--the question is about evaluating the result--irrelevant
(C) The urban class conducting the experiment was larger than the rural class conducting the experiment.
--the size of the class is irrelevant
(D) Heavy vehicular traffic such as is found in cities constantly deposits grime on greenhouse windows, reducing the amount of light that reaches the plants inside.
--the amount of light is important to the growth of plants--right
(E) Because of the higher levels of sulfur dioxide in the air at the urban school, the air filters for the urban school's greenhouse were changed more frequently than were those at the rural school.
--the frequency to change the filters is irrelevant
思路有一点点偏离~light本身就是一个variable
3.background information:.Many small roads do not have painted markings along their edges. Clear edge markings would make it easier for drivers to see upcoming curves and to judge the car's position on the road, particularly when visibility is poor, and would therefore seem to be a useful contribution to road safety.
premise: Greatwater County painted edge markings on all its narrow, winding roads,
conclusion:the annual accident rate along those roads actually increased slightly
narrow, windy & foggy~different
the markings are useful when the road has curves and is foggy~but G country painted them on narrow, windy roads
(A) Greatwater County has an unusually high proportion of narrow, winding roads.
--the question is to ask why there is an increase--irrelevant
(B) In bad weather it can be nearly as difficult for drivers to see the road as it is at night.
--irrelevant
(C) Prior to the painting of the edge markings, Greatwater County's narrow, winding roads already had a somewhat higher accident rate than other Greatwater County roads.
--the rates in the past are irrelevant
(D) Many of the accidents on narrow, winding roads involve a single vehicle veering off the road, rather than the collision of two vehicles.
--how do accident happen is irrelevant
(E) After the markings were painted on the roads, many drivers who had gone out of their way to avoid driving on those roads at night no longer did so.
--more drivers drive at night--the rates increase--right
话说思路又错了！！！好无奈呀
4. background information:Gortland has long been narrowly self-sufficient in both grain and meat.However, as per capita income in Gortland has risen toward the world average, per capita consumption of meat has also risen toward the world average, and it takes several pounds of grain to produce one pound of meat.
premise:per capita income continues to rise, whereas domestic grain production will not increase
conclusion:Gortland will soon have to import either grain or meat or both
the consumption of grain doesn't decrease~and the production of meat doesn't increase, or increases not as fast as the demand increases
(A) The total acreage devoted to grain production in Gortland will soon decrease.
--the production of grain will decrease--not necessary
(B) Importing either grain or meat will not result in a significantly higher percentage of Gortlanders' incomes being spent on food than is currently the case.
--irrelevant
(C) The per capita consumption of meat in Gortland is increasing at roughly the same rate across all income levels.
--per capita consumption of meat is mentioned in the stem of the question--irrelevant
(D) The per capita income of meat producers in Gortland is rising faster than the per capita income of grain producers.
--the income allocation is irrelevant
(E) People in Gortland who increase their consumption of meat will not radically decrease their consumption of grain.
--the meat and grain will both be in shortage--right
终于有一道题对了
5. background information:For years the beautiful Renaissance buildings in Palitito have been damaged by exhaust from the many tour buses that come to the city. There has been little parking space, so most buses have idled at the curb during each stop on their tour, and idling produces as much exhaust as driving.
premise:The city has now provided parking that accommodates a third of the tour buses
conclusion:damage to Palitito's buildings from the buses' exhaust will diminish significantly.
平均总有三分之一的buses需要停车，三分之二在路上~
(A) The exhaust from Palitito's few automobiles is not a significant threat to Palitito's buildings.
--irrelevant
(B) Palitito's Renaissance buildings are not threatened by pollution other than engine exhaust.
--the conclusion is about the damage from the buses' exhaust--irrelevant
(C) Tour buses typically spend less than one-quarter of the time they are in Palitito transporting passengers from one site to another.
--3/4>1/3--weaken--right???
(D) More tourists come to Palitito by tour bus than by any other single means of transportation.
--irrelevant
(E) Some of the tour buses that are unable to find parking drive around Palitito while their passengers are visiting a site.
--how does the drivers react is irrelevant--idling or driving ,they are the same--irrelevant
感觉C是相反的~不过别的都不对，只有C和预测的相关~可是究竟哪里想错了？？？
求指教—— | 
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发表于 2011-11-24 00:16:29
lants in the urban greenhouse grew more slowly than those in the rural greenhouse.
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