问答

2答疑

[Data Sufficiency]

登录查看答疑

试题详情

题目：

Given a positive number N, when N is rounded by a certain method (for convenience, call it Method Y), the result is 10n if and only if n is an integer and 5 × 10 n – 1 ≤ N < 5 × 10n. In a certain gas sample, there are, when rounded by Method Y, 1021 molecules of H2 and also 1021 molecules of O2. When rounded by Method Y, what is the combined number of H2 and O2 molecules in the gas sample?
  1. The number of H2 molecules and the number of O2 molecules are each less than 3 × 1021.
  2. The number of H2 molecules is more than twice the number of O2 molecules.

选项:

A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.

答案:

C
2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

It seems likely that a number of astronomical phenomena, such as the formation of planetary nebulas, may be caused by the interaction where two stars orbit each other at close range.

选项:

A、 may be caused by the interaction where two stars orbit each other
B、 may be caused by the interaction between two stars that each orbit the other
C、 are because of the interaction between two stars that orbit each other
D、 are caused by the interaction of two stars where each is orbiting the other
E、 are caused by the interaction of two stars orbiting each other

答案:

E
2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined.

选项:

A、More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined.
B、With 20 percent of the world's fresh water, that is more than all the North American Great Lakes combined, Siberia's Lake Baikal has more than 300 rivers that drain into it.
C、Siberia's Lake Baikal, with more than 300 rivers draining into it, it holds more of the world's fresh water than all that of the North American Great Lakes combined, 20 percent.
D、While more than 300 rivers drain into it, Siberia's Lake Baikal holds 20 percent of the world's fresh water, which is more than all the North American Great Lakes combined.
E、More than all the North American Great Lakes combined, Siberia's Lake Baikal, with more than 300 rivers draining into it, holds 20 percent of the world's fresh water.

答案:

A
2答疑

[Problem Solving]

登录查看答疑

试题详情

题目：

On a scale drawing, a rectangle 1 inch by inches represents the floor of a room and the indicated scale is 1 inch equals 15 feet. How many square tiles 6 inches on a side will be needed to cover this floor? (1 foot = 12 inches)

选项:

A、40
B、70
C、120
D、700
E、1,200

答案:

E
2答疑

[Problem Solving]

登录查看答疑

试题详情

题目：

The annual interest rate earned by an investment increased by 10 percent from last year to this year. If the annual interest rate earned by the investment this year was 1 percent, what was the annual interest rate last year?

选项:

A、1%
B、1.1%
C、0.91%
D、10%
E、10.8%

答案:

C
2答疑

[Data Sufficiency]

登录查看答疑

试题详情

题目：

Robin invested a total of $12,000 in two investments, X and Y, so that the investments earned the same amount of simple annual interest. How many dollars did Robin invest in investment Y ?
  1. Investment X paid 3 percent simple annual interest, and investment Y paid 6 percent simple annual interest.
  2. Robin invested more than $1,000 in investment X.

选项:

A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are not sufficient.

答案:

A
2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Unlike crested wheatgrass, an alien species from Siberia that forms only shallow roots and produces tall above-ground shoots, native North American grasses develop an extensive root system, allowing for greater enrichment of the soil, but do not grow to be very tall.

选项:

A、native North American grasses develop an extensive root system, allowing for greater enrichment of the soil, but do not grow to be very
B、native North American grasses develop an extensive root system, which allows for their greater enrichment of the soil, but without growing to be that
C、the root system of native North American grasses is extensive, allowing for greater enrichment of the soil, but they do not grow to be very
D、the root system of native North American grasses is more extensive, allowing for the greater enrichment of the soil, but these grasses do not grow to be very
E、the extensiveness of the root system of native North American grasses allows for their greater enrichment of the soil, but they do not grow to be that

答案:

A
2答疑

[Critical Reasoning]

登录查看答疑

试题详情

题目：

Which of the following most logically completes the argument?
 
Although the pesticide TDX has been widely used by fruit growers since the early 1960's, a regulation in force since 1960 has prohibited sale of fruit on which any TDX residue can be detected.  That regulation is about to be replaced by one that allows sale of fruit on which trace amounts of TDX residue are detected.  In fact, however, the change will not allow more TDX on fruit than was allowed in the 1960's, because ______.

选项:

A、pre-1970 techniques for detecting TDX residue could detect it only when it was present on fruit in more than the trace amounts allowed by the new regulations
B、many more people today than in the 1960's habitually purchase and eat fruit without making an effort to clean residues off the fruit
C、people today do not individually consume any more pieces of fruit, on average, than did the people in the 1960's
D、at least a small fraction of the fruit sold each year since the early 1960's has had on it greater levels of TDX than the regulation allows
E、the presence of TDX on fruit in greater than trace amounts has not been shown to cause any harm even to children who eat large amounts of fruit

答案:

A
2答疑

[Multi-Source Reasoning]

登录查看答疑

试题详情

文章：

Sports Association

Statement by sports association spokes-­person:

Our sports association issues contracts to television networks for the exclusive right to broadcast our sporting events. For this right, the networks pay the association substantial fees, which help finance our leagues. We also provide free media passes to our events for journalists so that they can effectively report on sports news, including final scores. Now, how­ever, some news organizations are posting video clips, audio clips, digital photographs, and live score updates from our events on their websites. Conditions must be placed on these practices, which go beyond mere sports news reporting; they harm the value of our broad­casting contracts and violate our rights as the owners of the sports leagues. News organiza­tions that wish to post such information on their websites should therefore sign contracts with the sports association that stipulate what post­ings will be allowed and how much they will cost. As we have in the past, we will deny media passes to journalists from news organi­zations that do not comply with our require­ments.

News Organizations

Statement by news organizations spokes­person:

me news business has largely shifted (rom print media to the Internet, where readers expect text to be accompanied by audio and Images To charge news organizations for providing online sports coverage or to place unnecessary conditions on that coverage is to deny news organizations their right to cover the news. Online news sites are not asking to broadcast sporting events In their entirety, and their sports reporting does not detract from the value of the sports leagues or their events. On the contrary—free, engaging sports reporting generates interest in sports and thus benefits readers and the sports association alike. News organizations must be allowed to report freely about sports on their websites, in any time­frame, using any type of online medium they deem effective.

题目：

10. For each of the following statements, select Accept if, based on the information provided, it can be inferred that both the sports association and the news organizations would likely accept that the statement is true. If not ,select Otherwise.

选项:

A、There should be no restrictions on news organizations' sport reporting in broadcast media.
B、A sporting event can be adequately reported by a news organization without broadcasting the event in its entirely on the organization's website.
C、Any online activity that substantially increases many people's interest in the sports association's leagues benefits the association.

答案:

B A B
2答疑

[Reading Comprehension]

登录查看答疑

试题详情

文章：

    For many years, historians thought that the development of capitalism had not faced serious challenges in the United States. Writing in the early twentieth century, Progressive historians sympathized with the battles waged by farmers and small producers against large capitalists in the late nineteenth century, but they did not question the widespread acceptance of laissez-faire (unregulated) capitalism throughout American history. Similarly, Louis Hartz, who sometimes disagreed with the Progressives, argued that Americans accepted laissez-faire capitalism without challenge because they lacked a feudal, precapitalist past. Recently, however, some scholars have argued that even though laissez-faire became the prevailing ethos in nineteen-century America, it was not accepted without struggle. Laissez-faire capitalism, they suggest, clashed with existing religious and communitarian norms that imposed moral constraints on acquisitiveness to protect the weak from the predatory, the strong from corruption, and the entire culture from materialist excess. Buttressed by mercantilist notions that government should be both regulator and promoter of economic activity, these norms persisted long after the American Revolution helped unleash the economic forces that produced capitalism. These scholars argue that even in the late nineteenth century, with the government's role in the economy considerably diminished, laissez-faire had not triumphed completely. Hard times continued to revive popular demands for regulating business and softening the harsh edges of aissez-faire capitalism.

题目：

The passage suggests that the scholars mentioned in the highlighted text would agree with which of the following statements regarding the "norms" mentioned in the highlighted text?

选项:

A、They provided a primary source of opposition to the development of laissez-faire capitalism in the United States in the nineteenth century.
B、Their appeal was undermined by difficult economic times in the United States at the end of the nineteenth century.
C、They disappeared in the United States in the late nineteenth century because of the triumph of laissez-faire capitalism.
D、They facilitated the successful implementation of mercantilist notions of government in the United States in the nineteenth-century.
E、They are now recognized by historians as having been an important part of the ideology of the American Revolution.

答案:

A
0评分
1929浏览

[Undefined]

登录查看答疑
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
5017浏览

[Undefined]

登录查看答疑
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
5699浏览

[Undefined]

登录查看答疑
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
1909浏览

[Undefined]

登录查看答疑
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
4127浏览

[GWD]

登录查看答疑
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
2889浏览

[OG]

登录查看答疑
The primary purpose of the passage is to
为什么选E不选B
0评分
1912浏览

[Undefined]

登录查看答疑
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
2001浏览

[Undefined]

登录查看答疑
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
426510浏览

[Undefined]

登录查看答疑
Analytical!
请问may老师，这题该用什么思路来做？
0评分
433648浏览

[Undefined]

登录查看答疑
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
点我领取
免费专项课程
 在线咨询