问答

2答疑

[Data Sufficiency]

试题详情

题目:

A certain circle in the xy-plane has its center at the origin.  If P is a point on the circle, what is the sum of the squares of the coordinates of P?
(1)     The radius of the circle is 4.
(2)     The sum of the coordinates of P is 0.

选项:

答案:

A
2答疑

[Critical Reasoning]

试题详情

文章:

In the past the country of Malvernia has relied heavily on imported oil. Malvernia recently implemented a program to convert heating systems from oil to natural gas. Malvernia currently produces more natural gas each year than it uses, and oil production in Malvernian oil fi elds is increasing at a steady pace. If these trends in fuel production and usage continue, therefore, Malvernian reliance on foreign sources for fuel is likely to decline soon.

题目:

Which of the following would it be most useful to establish in evaluating the argument?

选项:

A、When, if ever, will production of oil in Malvernia outstrip production of natural gas?Is Malvernia among the countries that rely most on imported oil? 
B、What proportion of Malvernia's total energy needs is met by hydroelectric, solar, and nuclear power? 
C、Is the amount of oil used each year in Malvernia for generating electricity and fuel for transportation increasing?
D、Have any existing oil-burning heating systems in Malvernia already been converted to naturalgas- burning heating systems?

答案:

D
2答疑

[Critical Reasoning]

试题详情

题目:

Crops can be traded on the futures market before they are harvested.  If a poor corn harvest is predicted, prices of corn futures rise; if a bountiful corn harvest is predicted, prices of corn futures fall.  This morning meteorologists are predicting much-needed rain for the corn-growing region starting tomorrow.  Therefore, since adequate moisture is essential for the current crop's survival, prices of corn futures will fall sharply today.
 
Which of the following, if true, most weakens the argument above?

选项:

A、Corn that does not receive adequate moisture during its critical pollination stage will not produce a bountiful harvest.
B、Futures prices for corn have been fluctuating more dramatically this season than last season.
C、The rain that meteorologists predicted for tomorrow is expected to extend well beyond the corn-growing region.
D、Agriculture experts announced today that a disease that has devastated some of the corn crop will spread widely before the end of the growing season.
E、Most people who trade in corn futures rarely take physical possession of the corn they trade.

答案:

D
2答疑

[Reading Comprehension]

试题详情

文章:

(This passage was excerpted from materialpublished in 1993.)

    Like many other industries, the travel industry is under increasing pressure to expand globally in order to keep pace with its corporate customers, who have globalized their operations in response to market pressure, competitor actions, and changing supplier relations. But it is difficult for service organizations to globalize. Global expansion through acquisition is usually expensive, and expansion through internal growth is time-consuming and sometimes impossible in markets that are not actively growing. Some service industry companies, in fact, regard these traditional routes to global expansion as inappropriate for service industries because of their special need to preserve local responsiveness through local presence and expertise. One travel agency has eschewed the traditional route altogether. A survivor of the changes that swept the travel industry as a result of the deregulation of the airlines in 1978—changes that included dramatic growth in the corporate demand for travel services, as well as extensive restructuring and consolidation within the travel industry— this agency adopted a unique structure for globalization. Rather than expand by attempting to develop its own offices abroad, which would require the development of local travel management expertise sufficient to capture foreign markets, the company solved its globalization dilemma effectively by forging alliances with the best foreign partners it could find. The resulting cooperative alliance of independent agencies now comprises 32 partners spanning 37 countries.

题目:

According to the passage, which of the following is true of the traditional routes to global expansion?

选项:

A、They have been supplanted in most service industries by alternative routes.
B、They are less attractive to travel agencies since deregulation of the airlines.
C、They may represent the most cost-effective means for a travel agency to globalize.
D、They may be unsuitable for service agencies that are attempting to globalize.
E、They are most likely to succeed in markets that are not actively growing.

答案:

D
2答疑

[Data Sufficiency]

试题详情

题目:

In the decimal representation of x, where 0<x <1, is the tenths digit of x nonzero?

(1) 16x is an integer.

(2) 8x is an integer.

选项:

答案:

B
2答疑

[Sentence Correction]

试题详情

题目:

Researchers now regard interferon as not a single substance, but it is rather a biological family of complex molecules that play an important, though not entirely defined, role in the immune system.

选项:

A、as not a single substance, but it is rather a biological family of complex molecules that play
B、as not a single substance but as a biological family of complex molecules playing
C、not as a single substance but as a biological family of complex molecules that play
D、not to be a single substance but rather a biological family of complex molecules playing
E、not as a single substance but instead as being a biological family of complex molecules that play

答案:

C
2答疑

[Sentence Correction]

试题详情

题目:

The computer company's present troubles are a result of technological stagnation, marketing missteps, and managerial blunders so that several attempts to revise corporate strategies have failed to correct it.

选项:

A、
A. so that several attempts to revise corporate strategies have failed to correct it
B、
B. so that several attempts at revising corporate strategies have failed to correct
C、
C. in that several attempts at revising corporate strategies have failed to correct them
D、
D. that several attempts to revise corporate strategies have failed to correct
E、
E. that several attempts at revising corporate strategies have failed to correct them

答案:

D
2答疑

[Problem Solving]

试题详情

题目:

In a nationwide poll, N people were interviewed.If $$frac{1}{4}$$ of them answered "yes" to question 1, and of those, $$frac{1}{3}$$ answered "yes" to question 2, which ofthe following expressions represents the numberof people interviewed who did not answer "yes" to both questions?

选项:

A、 $$\frac{N}{7}$$
B、 $$\frac{6}{7}N$$
C、 $$\frac{5}{12}N$$
D、 $$\frac{7}{12}N$$
E、 $$\frac{11}{12}N$$

答案:

E
2答疑

[Problem Solving]

试题详情

题目:

How many 4-digit positive integers are there in which all 4 digits are even?

选项:

A、625
B、600
C、500
D、400
E、256

答案:

C
2答疑

[Problem Solving]

试题详情

题目:

Pat invested x dollars in a fund that paid 8 percent annual interest, compounded annually.  Which of the following represents the value, in dollars, of Pat's investment plus interest at the end of 5 years?

选项:

A、5(0.08x )
B、5(1.08x )
C、[1 + 5(0.08)] x
D、(1.08)5 x
E、(1.08x )5

答案:

D
0评分
418浏览

[Undefined]

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?
0评分
1444浏览

[Undefined]

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
0评分
1613浏览

[Undefined]

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
0评分
619浏览

[Undefined]

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?
0评分
1426浏览

[GWD]

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
0评分
1009浏览

[OG]

The primary purpose of the passage is to
为什么选E不选B
0评分
672浏览

[Undefined]

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
0评分
690浏览

[Undefined]

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
0评分
160278浏览

[Undefined]

Analytical!
请问may老师,这题该用什么思路来做?
0评分
167387浏览

[Undefined]

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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