问答

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[Problem Solving]

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题目：

Each year for 4 years, a farmer increased the number of trees in a certain orchard by of the number of trees in the orchard the preceding year. If all of the trees thrived and there were 6,250 trees in the orchard at the end of the 4-year period, how many trees were in the orchard at the beginning of the 4-year period?

选项:

A、1,250
B、1,563
C、2,250
D、2,560
E、2,752

答案:

D
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[Problem Solving]

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题目：

In a corporation, 50 percent of the male employees and 40 percent of the female employees are at least 35 years old. If 42 percent of all the employees are at least 35 years old, what fraction of the employees in the corporation are females?

选项:

A、3/5
B、2/3
C、3/4
D、4/5
E、5/6

答案:

D
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[Critical Reasoning]

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题目：

Which of the following best completes the passage below?
 
At a recent conference on environmental threats to the North Sea, most participating countries favored uniform controls on the quality of effluents, whether or not specific environmental damage could be attributed to a particular source of effluent.  What must, of course, be shown, in order to avoid excessively restrictive controls, is that __________.

选项:

A、any uniform controls that are adopted are likely to be implemented without delay
B、any substance to be made subject to controls can actually cause environmental damage
C、the countries favoring uniform controls are those generating the largest quantities of effluents
D、all of any given pollutant that is to be controlled actually reaches the North Sea at present
E、environmental damage already inflicted on the North Sea is reversible

答案:

B
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[Problem Solving]

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题目：

There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks.  How many possible selections of 4 books from this self include at least one paperback?

选项:

A、 40
B、 45
C、 50
D、 55
E、 60

答案:

D
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[Problem Solving]

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题目：

The parallelogram shown has four sides of equal length. What is the ratio of the length of the shorter diagonal to the length of the longer diagonal?

选项:

A、
B、
C、
D、
E、

答案:

D
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[Reading Comprehension]

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文章：

    Ecoefficiency (measures to minimize environmental impact through the reduction or elimination of waste from production processes) has become a goal for companies worldwide, with many realizing significant cost savings from such innovations. Peter Senge and Goran Carstedt see this development as laudable but suggest that simply adopting ecoefficiency innovations could actually worsen environmental stresses in the future. Such innovations reduce production waste but do not alter the number of products manufactured nor the waste generated from their use and discard; indeed, most companies invest in ecoefficiency improvements in order to increase profits and growth. Moreover, there is no guarantee that increased economic growth from ecoefficiency will come in similarly ecoefficient ways, since in today's global markets, greater profits may be turned into investment capital that could easily be reinvested in old-style eco-inefficient industries. Even a vastlymore ecoefficient industrial system could, were it to grow much larger, generate more total waste and destroy more habitat and species than would a smaller, less ecoefficient economy. Senge and Carstedt argue that to preserve the global environment and sustain economic growth, businesses must develop a new systemic approach that reduces total material use and total accumulated waste. Focusing exclusively on ecoefficiency, which offers a compelling business case according to established thinking, may distract companies from pursuing radically different products and business models.

题目：

According to the passage, an exclusive pursuit of ecoefficiency may cause companies to

选项:

A、neglect the development of alternative business models and products
B、keep the number of products that they manufacture unchanged
C、invest capital from increased profits primarily in inefficient and outmoded industries that may prove unprofitable
D、overemphasize the production process as the key to increasing profits and growth
E、focus more on reducing costs than on reducing the environmental impact of production processes

答案:

A
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[Sentence Correction]

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题目：

Problems at a California securities firm rippled through the penny-stock market, forcing at least one Floridabrokerage firm to stop trading, and it sent the shares
of several small companies tumbling

选项:

A、forcing at least one Florida brokerage firm to stop trading, and it sent
B、forcing at least one Florida brokerage firm to stop  trading and sending
C、forced at least one Florida brokerage firm to stop trading and sending
D、with at least one Florida brokerage firm forced to stop trading and sending
E、at least one Florida brokerage firm was forced to stop trading ,and it sent

答案:

B
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[Sentence Correction]

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题目：

Tropical bats play important roles in the rain forest ecosystem, aiding in the dispersal of cashew, date, and fig seeds; pollinating banana, breadfruit, and mango trees; and indirectly help produce tequila by pollinating agave plants.

选项:

A、pollinating banana, breadfruit, and mango trees; and indirectly help produce
B、pollinating banana, breadfruit, and mango trees; and indirectly helping to produce
C、pollinating banana, breadfruit, and mango trees; and they indirectly help to produce
D、they pollinate banana, breadfruit, and mango trees; and indirectly help producing
E、they pollinate banana, breadfruit, and mango trees; indirectly helping the producing of

答案:

B
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[Sentence Correction]

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题目：

Defense attorneys have occasionally argued that their clients' misconduct stemmed from a reaction to something ingested, but in attributing criminal or delinquent behavior to some food allergy, the perpetrators are in effect told that they are not responsible for their actions.

选项:

A、in attributing criminal or delinquent behavior to some food allergy,
B、if criminal or delinquent behavior is attributed to an allergy to some food,
C、in attributing behavior that is criminal or delinquent to an allergy to some food,
D、if some food allergy is attributed as the cause of criminal or delinquent behavior,
E、in attributing a food allergy as the cause of criminal or delinquent behavior,

答案:

B
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[Critical Reasoning]

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题目：

Many people suffer an allergic reaction to certain sulfites, including those that are commonly added to wine as preservatives. However, since there are several winemakers who add sulfites to none of the wines they produce, people who would like to drink wine but are allergic to sulfites can drink wines produced by these winemakers without risking an allergic reaction to sulfites.

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

选项:

A、These winemakers have been able to duplicate the preservative effect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.
B、Not all forms of sulfite are equally likely to produce the allergic reaction.
C、Wine is the only beverage to which sulfites are commonly added.
D、Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.
E、Sulfites are not naturally present in the wines produced by these winemakers in amounts large enough to produce an allergic reaction in someone who drinks these wines.

答案:

E
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791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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2637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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[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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[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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[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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[Undefined]

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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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[Undefined]

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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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