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[Sentence Correction]

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题目：

The current economic downturn has significantly reduced advertising income both for business journals as well as general consumer magazines, especially if focusing on technology.

选项:

A、has significantly reduced advertising income both for business journals as well as general consumer magazines, especially if focusing
B、has significantly reduced advertising income both for business journals and for general consumer magazines, especially those focusing
C、significantly reduced advertising income for both business journals and for general consumer magazines, especially when focused
D、reduced both business journals' and general consumer magazines' advertising income significantly, especially if focused
E、reduced advertising income significantly for both business journals, as well as for general consumer magazines, especially those focusing

答案:

B
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[Problem Solving]

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题目：

In an electric circuit, two resistors with resistances x and y are connected in parallel. In this case, if r is the combined resistance of these two resistors, then the reciprocal of r is equal to the sum of the reciprocals of x and y. What is r in terms of x and y?

选项:

A、xy
B、
C、
D、
E、

答案:

D
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[Critical Reasoning]

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题目：

A year ago, Dietz Foods launched a yearlong advertising campaign for its canned tuna. Last year Dietz sold 12 million cans of tuna compared to the 10 million sold during the previous year, an increase directly attributable to new customers brought in by the campaign. Profits from the additional sales, however, were substantially less than the cost of the advertising campaign. Clearly, therefore, the campaign did nothing to further Dietz’s economic interests.

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

选项:

A、Sales of canned tuna account for a relatively small percentage of Dietz Foods’ profits.
B、Most of the people who bought Dietz’s canned tuna for the first time as a result of the campaign were already loyal customers of other Dietz products.
C、A less expensive advertising campaign would have brought in significantly fewer new customers for Dietz’s canned tuna than did the campaign Dietz Foods launched last year.
D、Dietz made money on sales of canned tuna last year.
E、In each of the past five years, there was a steep, industry-wide decline in sales of canned tuna.

答案:

E
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题目：

Unlike most severance packages, which require workers to stay until the last day scheduled to collect, workers at the automobile company are eligible for its severance package even if they find a new job before they are terminated.

选项:

A、 the last day scheduled to collect, workers at the automobile company are eligible for its severance package
B、 the last day they are scheduled to collect, workers are eligible for the automobile company's severance package
C、 their last scheduled day to collect, the automobile company offers its severance package to workers
D、 their last scheduled day in order to collect, the automobile company's severance package is available to workers
E、 the last day that they are scheduled to collect, the automobile company's severance package is available to workers

答案:

D
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[Critical Reasoning]

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题目：

One summer, floods covered low-lying garlic fields situated in a region with a large mosquito population. Since mosquitoes lay their eggs in standing water, flooded fields would normally attract mosquitoes, yet no mosquitoes were found in the fields. Diallyl sulfide, a major component of garlic, is known to repel several species of insects, including mosquitoes, so it is likely that diallyl sulfide from the garlic repelled the mosquitoes.

Which of the following, if true, most strengthens the argument?

选项:

A、Diallyl sulfide is also found in onions but at concentrations lower than in garlic.
B、The mosquito population of the region as a whole was significantly smaller during the year in which the flooding took place than it had been in previous years.
C、By the end of the summer, most of the garlic plants in the flooded fields had been killed by waterborne fungi.
D、Many insect species not repelled by diallyl sulfide were found in the flooded garlic fields throughout the summer.
E、Mosquitoes are known to be susceptible to toxins in plants other than garlic, such as marigolds.

答案:

D
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题目：

Between 14,000 and 8,000 b.c. the ice cap that covered northern Asia, Europe, and America began to melt, uncovering vast new areas that were to be occupied by migrating peoples moving northward.

选项:

答案:

A
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题目：

Because there are provisions of the new maritime code that provide that even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas, they have already stimulatedinternational disputes over uninhabited islands.

选项:

A、Because there are provisions of the new maritime code that provide that even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas, they have already stimulatedBecause the new maritime code provides that even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas, it has already stimulated
B、Even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas under provisions of the new maritime code, already stimulating
C、Because even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas under provisions of the new maritime code, this has already stimulated
D、Because even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas under provisions of the new maritime code, which is already stimulating

答案:

B
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[Critical Reasoning]

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题目：

Charcoal from a hearth site in Colorado, 2,000 miles south of Alaska, is known to be 11,200 years old.  Researchers reasoned that, since glaciers prevented human migration south from the Alaska-Siberia land bridge between 18,000 and 11,000 years ago, humans must have come to the Americas more than 18,000 years ago.
 
Which of the following pieces of new evidence would cast doubt on the conclusion drawn above?

选项:

A、Using new radiocarbon dating techniques, it was determined that the charcoal from the Colorado site was at least 11,400 years old.
B、Another campsite was found in New Mexico with remains dated at 16,000 years old.
C、A computer simulation of glacial activity showed that it would already have been impossible for humans to travel south overland from Alaska 18,500 years ago.
D、Using new radiocarbon dating techniques, it was proved that an ice-free corridor allowed passage south from the Alaska-Siberia land bridge at least 11,400 years ago.
E、Studies of various other hunting-gathering populations showed convincingly that, once the glaciers allowed passage, humans could have migrated from Alaska to Colorado in about 20 years.

答案:

D
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题目：

The Eastern State Penitentiary was established in 1822 by reformers advocating that prisoners be held in solitary confinement and hard labor so as to reform them.

选项:

A、advocating that prisoners be held in solitary confinement and hard labor so as to reform them
B、who were advocating prisoners to be held in solitary confinement and hard labor for their reform
C、advocating solitary confinement and hard labor as the means to reform prisoners
D、who advocated solitary confinement and hard labor for the means of prisoner reform
E、advocating as the means for prisoner reform solitary confinement and hard labor

答案:

C
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[Reading Comprehension]

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文章：

Some historians contend that conditions in the United States during the Second World War gave rise to a dynamic wartime alliance between trade unions and the African American community, an alliance that advanced the cause of civil rights.  They conclude that the postwar demise of this vital alliance constituted a lost opportunity for the civil rights movement that followed the war.  Other scholars, however, have portrayed organized labor as defending all along the relatively privileged position of White workers relative to African American workers.  Clearly, these two perspectives are not easily reconcilable, but the historical reality is not reducible to one or the other.
 
Unions faced a choice between either maintaining the prewar status quo or promoting a more inclusive approach that sought for all members the right to participate in the internal affairs of unions, access to skilled and high-paying positions within the occupational hierarchy, and protection against management's arbitrary authority in the workplace.  While union representatives often voiced this inclusive ideal, in practice unions far more often favored entrenched interests.  The accelerating development of the civil rights movement following the Second World War exacerbated the unions' dilemma, forcing trade unionists to confront contradictions in their own practices.

题目：

According to the passage, the historians mentioned in the first highlighted portion of text and the scholars mentioned in the second highlighted portion disagree about the

选项:

A、contribution made by organized labor to the war effort during the Second World War
B、issues that union members considered most important during the Second World War
C、relationship between unions and African Americans during the Second World War
D、effect of the Second World War on the influence of unions in the workplace
E、extent to which African Americans benefited from social and political changes following the Second World War

答案:

C
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581浏览

[Undefined]

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Art historian: Unlike many artistic traditions that sought to depict plants native to the local area in a seasonally appropriate way (for example, depicting scenes of spring with the plants in the appropriate stages of development for that season), seventeenth-century Dutch artists specializing in flower paintings almost exclusively chose to depict exotic species of flowers from outside the local area. Painting such species was worthwhile primarily because the art-buying public had developed a strong preference for images of the exotic. The great botanical centers of the time gave the artists direct access to such flowers, which the artists would freely combine in a single painting, regardless of whether the combined species occurred together in the wild, and depicted each in full bloom, regardless of whether those species bloomed at the same time in nature.

Statement: The art historian makes the point that the species of flowers these Dutch artists chose to paint were 1 largely because the species were 2 .

Select for 1 and for 2 the options that complete the statement so that it is most strongly supported by the information provided. Make only two selections, one in each column.
我选的CE，和EC有什么区别？怎么选出EC的？
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[Undefined]

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An unusually severe winter occurred in Europe after the continent was blanketed by a blue haze resulting from the eruption of the Laki Volcano in the European republic of Iceland in the summer of 1984.  Thus, it is evident that major eruptions cause the atmosphere to become cooler than it would be otherwise.
Which of the following statements, if true, most seriously weakens the argument above?
C选项为什么就不会有张冠李戴的问题呢，1984和1982的气候情况能一样吗，C里的火山就可以试用于原文的火山吗
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1962浏览

[Undefined]

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The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentration of chemical B present. If the concentration of chemical B is increased by 100 percent, which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?
为什么这个题一定是相乘不能是相加呢？y=k1A方-k2B （k1,k2大于0 ），也满足题目说的与A方成正比与B成反比啊？但是这道题只有相乘的情况才能选出正确答案
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[Undefined]

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Tiger beetles are such fast runners that they can capture virtually any nonflying insect.  However, when running toward an insect, the beetles intermittently stop, and then, a moment later, resume their attack.  Perhaps they cannot maintain their pace and must pause for a moment's rest; but an alternative hypothesis is that while running tiger beetles are unable to process the resulting rapidly changing visual information, and so quickly go blind and stop.
 
Which of the following, if discovered in experiments using artificially moved prey insects, would support one of the two hypotheses and undermine the other?
答案C是怎么支持一个猜想又削弱另一个猜想的？
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1663浏览

[GWD]

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The author of the passage implies that which of the following is a possible partial explanation for acquisition behavior during the 1970's and 1980's?
请解释这道题为什么不选C或E，除了正确选项B，我认为文中也正确地提到了这两个选项可以解释acquisition behavior during 1970s and 80s
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1149浏览

[OG]

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The primary purpose of the passage is to
为什么选E不选B
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772浏览

[Undefined]

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Club X has more than 10 but fewer than 40 members. Sometimes the members sit at tables with 3 members at one table and 4 members at each of the other tables, and sometimes they sit at tables with 3 members at one table and 5 members at each of the other tables. If they sit at tables with 6 members at each table except one and fewer than 6 members at that one table, how many members will be at the table that has fewer than 6 members?
提问小梅老师 这道题求讲一下 我没什么思路 带入数字得的是3
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791浏览

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A photography dealer ordered 60 Model X cameras to be sold for $250 each, which represents a 20 percent markup over the dealer's initial cost for each camera. Of the cameras ordered, 6 were never sold and were returned to the manufacturer for a refund of 50 percent of the dealer's initial cost. What was the dealer's approximate profit or loss as a percent of the dealer's initial cost for the 60 cameras?
请问小梅老师 这道题讲讲一下 我算的是19% 原来成本是200每个 亏了6个 每个亏100. 最后得不出答案
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Analytical!
请问may老师，这题该用什么思路来做？
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188777浏览

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Analytical!
请问张老师，这道题为什么D不对？我有我觉得second paragraph最后一句话特别指向D
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