[Data Sufficiency]
试题详情
题目：
What is the remainder when the positive integer n is divided by the positive integer k, where k ＞ 1?
(1) n = (k+1)3
(2) k = 5
选项:
答案:
A
问答
2答疑
2答疑
[Sentence Correction]
试题详情
题目：
Travelers from Earth to Mars would have to endure low levels of gravity for long periods of time, avoiding large doses of radiation, plus contending with the chemically reactive Martian soil, and perhaps even ward off contamination by Martian life-forms.
选项:
A、Mars would have to endure low levels of gravity for long periods of time, avoiding large doses of radiation, plus contending
B、Mars would have to endure low levels of gravity for long periods of time, avoid large doses of radiation, contend
C、Mars, having to endure low levels of gravity for long periods of time, would also have to avoid large doses of radiation, plus contending
D、Mars, having to endure low levels of gravity for long periods of time, avoid large doses of radiation, plus contend
E、Mars, who would have to endure low levels of gravity for long periods of time, avoid large doses of radiation, contend with
答案:
B
2答疑
[Critical Reasoning]
试题详情
题目：
For over two centuries, no one had been able to make Damascus blades—blades with a distinctive serpentine surface pattern—but a contemporary sword maker may just have rediscovered how. Using iron with trace impurities that precisely matched those present in the iron used in historic Damascus blades, this contemporary sword maker seems to have finally hit on an intricate process by which he can produce a blade indistinguishable from a true Damascus blade.
Which of the following, if true, provides the strongest support for the hypothesis that trace impurities in the iron are essential for the production of Damascus blades?
选项:
A、
A. There are surface features of every Damascus blade—including the blades produced by the contemporary sword maker—that are unique to that blade.
B、
B. The iron with which the contemporary sword maker made Damascus blades came from a source of iron that was unknown two centuries ago.
C、
C. Almost all the tools used by the contemporary sword maker were updated versions of tools that were used by sword makers over two centuries ago.
D、
D. Production of Damascus blades by sword makers of the past ceased abruptly after those sword makers' original source of iron became exhausted.
E、
E. Although Damascus blades were renowned for maintaining a sharp edge, the blade made by the contemporary sword maker suggests that they may have maintained their edge less well than blades made using what is now the standard process for making blades.
答案:
D
2答疑
[Sentence Correction]
试题详情
题目：
The 32 species that make up the dolphin family are closely related to whales and in fact include the animal known as the killer whale, which can grow to be 30 feet long and is famous for its aggressive hunting pods.
选项:
A、include the animal known as the killer whale, which can grow to be 30 feet long and is
B、include the animal known as the killer whale, growing as big as 30 feet long and
C、include the animal known as the killer whale, growing up to 30 feet long and being
D、includes the animal known as the killer whale, which can grow as big as 30 feet long and is
E、includes the animal known as the killer whale, which can grow to be 30 feet long and it is
答案:
A
2答疑
[Data Sufficiency]
试题详情
题目：
If x3y4 = 5,000, is y = 5?
(1) y is a positive integer.
(2) x is an integer.
选项:
答案:
C
2答疑
[Sentence Correction]
试题详情
题目：
As a result of a supernova explosion, every human being on Earth was bombarded on February 23, 1987, by about 100 billion neutrinos; fortunately, neutrinos are harmless elementary particles that are produced in nuclear reactions and that interact very weakly with matter.
选项:
A、 neutrinos are harmless elementary particles that are produced in nuclear reactions and that
B、 neutrinos, which are harmless, are elementary particles produced in nuclear reactions and which
C、 neutrinos are harmless elementary particles produced in nuclear reactions and which
D、 these harmless elementary particles are produced in nuclear reactions, and neutrinos
E、 these elementary particles, harmless products of nuclear reactions, are neutrinos that
答案:
A
2答疑
[Critical Reasoning]
试题详情
文章：
One of the limiting factors in human physical performance is the amount of oxygen that is absorbed by the muscles from the bloodstream. Accordingly, entrepreneurs have begun selling at gymnasiums and health clubs bottles of drinking water, labeled "SuperOXY," that has extra oxygen dissolved in the water. Such water would be useless in improving physical performance, however, since the amount of oxygen in the blood of someone who is exercising is already more than the muscle cells can absorb.
题目：
Which of the following, if true, would serve the same function in the argument as the statement in boldface?
选项:
A、world-class athletes turn in record performances without such waterfrequent physical exercise increases the body's ability to take in and use oxygen
B、the only way to get oxygen into the bloodstream so that it can be absorbed by the muscles is through the lungs
C、lack of oxygen is not the only factor limiting human physical performance
D、the water lost in exercising can be replaced with ordinary tap water
答案:
C
2答疑
[Data Sufficiency]
试题详情
题目：
If a, b, c, and d are positive numbers, is ?
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:
B
2答疑
[Critical Reasoning]
试题详情
题目：
The recycling of municipal solid waste is widely seen as an environmentally preferable alternative to the prevailing practices of incineration and of dumping in landfills. Recycling is profitable, as the recycling programs already in operation demonstrate. A state legislator proposes that communities should therefore be required to adopt recycling and to reach the target of recycling 50 percent of all solid waste within 5 years.
Which of the following, if true, most seriously calls into question the advisability of implementing the proposal?
选项:
A、Existing recycling programs have been voluntary, with citizen participation ranging from 30 percent in some communities to 80 percent in others.
B、Existing recycling programs have been restricted to that 20 percent of solid waste that, when reprocessed, can match processed raw materials in quality and price.
C、Existing recycling programs have had recurrent difficulties finding purchasers for their materials, usually because of quantities too small to permit cost-effective pickup and transportation.
D、Some of the materials that can be recycled are the very materials that, when incinerated, produce the least pollution.
E、Many of the materials that cannot be recycled are also difficult to incinerate.
答案:
B
2答疑
[Data Sufficiency]
试题详情
题目：
S is a set of points in the plane. How many distinct triangles can be drawn that have three of the points in S as vertices?
(1) The number of distinct points in S is 5.
(2) No three of the points in S are collinear.
选项:
答案:
C
0评分
1129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.
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
3199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
3532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
1181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
2704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
1855浏览
0评分
1196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
1253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
297021浏览
0评分
304149浏览
