问答

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[Sentence Correction]

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题目：

Over 75 percent of the energy produced in France derives from nuclear power, while in Germany it is just over 33 percent.

选项:

A、while in Germany it is just over 33 percent
B、compared to Germany, which uses just over 33 percent
C、whereas nuclear power accounts for just over 33 percent of the energy produced in Germany
D、whereas just over 33 percent of the energy comes from nuclear power in Germany
E、compared with the energy from nuclear power in Germany, where it is just over 33 percent

答案:

C
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[Critical Reasoning]

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题目：

Last year a global disturbance of weather patterns disrupted harvests in many of the world’s important agricultural areas. Worldwide production of soybeans, an important source of protein for people and livestock alike, was not adversely affected, however. Indeed, last year’s soybean crop was actually slightly larger than average. Nevertheless, the weather phenomenon is probably responsible for a recent increase in the world price of soybeans.

Which of the following, if true, provides the strongest justification for the attribution of the increase in soybean prices to the weather phenomenon?

选项:

A、Last year’s harvest of anchovies, which provide an important protein source for livestock, was disrupted by the effects of the weather phenomenon.
B、Most countries that produce soybeans for export had above-average harvests of a number of food crops other than soybeans last year.
C、The world price of soybeans also rose several years ago, immediately after an earlier occurrence of a similar global weather disturbance.
D、Heavy rains attributable to the weather phenomenon improved grazing pastures last year, allowing farmers in many parts of the world to reduce their dependence on supplemental feed.
E、Prior to last year, soybean prices had been falling for several years.

答案:

A
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[Sentence Correction]

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题目：

Unlike many United States cities, where a river is no longer the focal point of urban life, the river in San Antonio winds through the middle of the business district, and the River Walk, or Paseo del Rio, is the city's most popular attraction.

选项:

A、Unlike many United States cities, where a river is no longer the focal point of urban life, the river in San Antonio
B、Unlike the river in many cities in the United States, which is no longer the focal point of urban life, in San Antonio the river
C、Today the river in many cities in the United States is no longer the focal point of urban life, unlike San Antonio, where it
D、In few United States cities today, a river is the focal point of urban life, but the river in San Antonio
E、 No longer do many cities in the United States have a river as the focal point of urban life, but in San Antonio the river

答案:

E
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[Sentence Correction]

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题目：

For the first time in the modern era, non-Hispanic Whites are officially a minority in California, which amounts to a little less than half the population of the state, down from nearly three-quarters only a decade ago.

选项:

A、which amounts to a little less than half the population of the state, down from nearly three-quarters only a decade ago
B、which amounts to a little less than half the population of the state, down from a decade ago, when it was nearly three-quarters
C、and that amounts to a little less than half the population of the state, down from a decade ago, when they were nearly three-quarters
D、amounting to a little less than half the population of the state, down from nearly three-quarters a decade ago
E、amounting to a little less than half the population of the state, down from what it was a decade ago by nearly three-quarters

答案:

D
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[Sentence Correction]

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题目：

Turning away from literary realism to write romantic stories about the peasant life and landscape of northern Sweden, in 1909 Selma Lagerlof was the novelist who became the first woman and was also the first Swedish writer to win the Nobel Prize for Literature.

选项:

A、Turning away from literary realism to write romantic stories about the peasant life and landscape of northern Sweden, in 1909 Selma Lagerlof was the novelist who became the first woman and was also the first Swedish writer to win
B、She turned away from literary realism and wrote romantic stories about the peasant life and landscape of northern Sweden, and novelist Selma Lagerlof in 1909 became the first woman as well as the first Swedish writer that won
C、Selma Lagerlof was a novelist who turned away from literary realism to write romantic stories about the peasant life and landscape of northern Sweden, and in 1909 she became the first woman in addition to the first Swedish writer winning
D、A novelist who turned away from literary realism to write romantic stories about the peasant life and landscape of northern Sweden, Selma Lagerlof became in 1909 the first woman and also the first Swedish writer to win
E、As a novelist, Selma Lagerlof turned away from literary realism and wrote romantic stories about the peasant life and landscape of northern Sweden, in 1909 becoming the first woman and also the first Swedish writer that won

答案:

D
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[Critical Reasoning]

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题目：

Kernland imposes a high tariff on the export of unprocessed cashew nuts in order to ensure that the nuts are sold to domestic processing plants.  If the tariff were lifted and unprocessed cashews were sold at world market prices, more farmers could profit by growing cashews.  However, since all the processing plants are in urban areas, removing the tariff would seriously hamper the government's effort to reduce urban unemployment over the next five years.
 
Which of the following, if true, most seriously weakens the argument?

选项:

A、Some of the by-products of processing cashews are used for manufacturing paints and plastics.
B、Other countries in which cashews are processed subsidize their processing plants.
C、More people in Kernland are engaged in farming cashews than in processing them.
D、Buying unprocessed cashews at lower than world market prices enables cashew processors in Kernland to sell processed nuts at competitive prices.
E、A lack of profitable crops is driving an increasing number of small farmers in Kernland off their land and into the cities.

答案:

E
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[Reading Comprehension]

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文章：

    Extensive research has shown that the effects of short-term price promotions on sales are themselves short-term. Companies' hopes that promotions might have a positive aftereffect have not been borne out for reasons that researchers have been able to identify. A price promotion entices only a brand's long-term or "loyal" customers; people seldom buy an unfamiliar brand merely because the price is reduced. They simply avoid paying more than they have to when one of their customary brands is temporarily available at a reduced price. A price promotion does not increase the number of long-term customers of a brand, as it attracts virtually no new customers in the first place. Nor do price promotions have lingering aftereffects for a brand, even negative ones such as damage to a brand's reputation or erosion of customer loyalty, as is often feared.

    So why do companies spend so much on price promotions? Clearly price promotions are generally run at a loss, otherwise there would be more of them. And the bigger the increase in sales at promotion prices, the bigger the loss. While short-term price promotions can have legitimate uses, such as reducing excess inventory, it is the recognizable increase in sales that is their main attraction to management, which is therefore reluctant to abandon this strategy despite its effect on the bottom line.

题目：

The passage suggests that evidence for price promotions' "effect on the bottom line" (in the highlighted text) is provided by

选项:

A、the lack of lingering aftereffects from price promotions
B、the frequency with which price promotions occur
C、price promotions' inability to attract new customers
D、price promotions' recognizable effect on sales
E、the legitimate uses to which management can put price promotions

答案:

B
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[Sentence Correction]

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题目：

In1852 Robert Angus Smith published a detailed report
of the chemistry of rain kin a large area around the city of
Manchester, England ,noting that the closer one came to
town, the more the city air would become increasingly acidic

选项:

A、that the closer one came to town, the mote the city air would become increasingly acidic
B、that the city air became increasingly acidic the closer one came to town
C、that coming closer to town, the city air became increasingly acidic
D、that the more the city air became increasingly acidic, the closer one was to town,
E、the city air becoming increasingly acidic as one would come closer to town

答案:

B
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[Sentence Correction]

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题目：

Several financial officers of the company spoke on condition that they not be named in the press reports.

选项:

A、that they not be named
B、that their names will not be used
C、that their names are not used
D、of not having their names
E、of not naming them

答案:

A
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题目：

In no other historical sighting did Halley's comet cause such a worldwide sensation as did its return in 1910-1911.

选项:

A、did its return in 1910-1911
B、had its 1910-1911 return
C、in its return of 1910-1911
D、its return of 1910-1911 did
E、its return in 1910-1911

答案:

C
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269浏览

[OG19]

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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?
计算过程没有看懂，麻烦may老师再讲一遍
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[OG]

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A sequence of numbers a1, a2, a3, . . . is defined as follows: a1 = 3, a2 = 5, and every term in the sequence after a2 is the product of all terms in the sequence preceding it, e.g., a3 = (a1)(a2) and a4 = (a1)(a2)(a3). If an = t and n ˃ 2, what is the value of an + 2 in terms of t ?
没有听懂an an+1 an+2怎么出来的
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[GWD]

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In the rectangular coordinate system, points (4, 0) and (– 4, 0) both lie on circle C. What is the maximum possible value of the radius of C ?
这里的lie on的意思是两个点可以在圆上（相交）也可以在圆的上部（不相交）吗？
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253浏览

[OG]

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Thabo owns exactly 140 books, and each book is either paperback fiction, paperback nonfiction, or hardcover nonfiction. If he owns 20 more paperback nonfiction books than hardcover nonfiction books, and twice as many paperback fiction books as paperback nonfiction books, how many hardcover nonfiction books does Thabo own?
为什么hardcover fiction是0，没有想通是怎么判断的
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435浏览

[OG19]

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There are 10 books on a shelf, of which 4 are paperbacks and 6 are hardbacks. How many possible selections of 5 books from the shelf contain at least one paperback and at least one hardback?
为什么c（4，1）c（6，1）c（8，3）取出来的是不完整的
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403浏览

[Undefined]

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A company plans to assign identification numbers to its employees. Each number is to consist of four different digits from 0 to 9, inclusive, except that the first digit cannot be 0. How many different identification numbers are possible?
这个为什么不能是c（9，1）c（10，1）c（10，1）c（10，1）
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325浏览

[Undefined]

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If money is invested at r percent interest, compounded annually, the amount of the investment will double in approximately  years. If Pat's parents invested $5,000 in a long-term bond that pays 8 percent interest, compounded annually, what will be the approximate total amount of the investment 18 years later, when Pat is ready for college?
没有理解为什么题目意思是每70/8年翻倍一次，我的理解是这个翻倍是一次性的，在70/8年的时候
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[Undefined]

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Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modified seed would be unlikely to increase profits.

Which of the following would it be most useful to know in order to evaluate the argument?
没有理解为什么D是对的，需要比较的不是普通种子需要的杀虫剂用量吗？为啥转基因corn的杀虫剂用量可以影响结论？
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561浏览

[Undefined]

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Between 1980 and 2000 the sea otter population of the Aleutian Islands declined precipitously. There were no signs of disease or malnutrition, so there was probably an increase in the number of otters being eaten by predators. Orcas will eat otters when seals, their normal prey, are unavailable, and the Aleutian Islands seal population declined dramatically in the 1980s. Therefore, orcas were most likely the immediate cause of the otter population decline.

Which of the following, if true, most strengthens the argument?
可以理解为什么C对，但是为什么E的slight decline是影响很小到可以忽略不计呢？就是小规模的食物减少也会引起seal减少，从而使orca吃otter
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453浏览

[Undefined]

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When there is less rainfall than normal, the water level of Australian rivers falls and the rivers flow more slowly. Because algae whose habitat is river water grow best in slow-moving water, the amount of algae per unit of water generally increases when there has been little rain. By contrast, however, following a period of extreme drought, algae levels are low even in very slow-moving river water.

Which of the following, if true, does most to explain the contrast described above?
为什么D选项河流短暂干了推出海藻死了，不算过度推理？可能干了很短时间但海藻没死呢？
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