[Sentence Correction]
试题详情
题目：
Sound can travel through water for enormous distances, prevented from dissipating its acoustic energy as a result of boundaries in the ocean created by water layers of different temperatures and densities.
选项:
答案:
C
问答
1答疑
1答疑
[Sentence Correction]
试题详情
题目：
Thomas Eakins' powerful style and his choices of subject—the advances in modern surgery, the discipline of sport, the strains of individuals in tension with society or even with themselves—was as disturbing to his own time as it is compelling for ours.
选项:
答案:
B
1答疑
[Reading Comprehension]
试题详情
文章：
题目：
The author of the passage would be most likely to agree with which of the following statements about the Milankovitch theory?
选项:
A、It is the only possible explanation for the ice ages.
B、It is too limited to provide a plausible explanation for the ice ages, despite recent research findings.
C、It cannot be tested and confirmed until further research on volcanic activity is done.
D、It is one plausible explanation, though not the only one, for the ice ages.
E、It is not a plausible explanation for the ice ages, although it has opened up promising possibilities for future research.
答案:
D
1答疑
[Problem Solving]
试题详情
题目：
What is the greatest prime factor of 2100 - 296?
选项:
A、2
B、3
C、5
D、7
E、11
答案:
C
1答疑
[Critical Reasoning]
试题详情
题目：
The Sumpton town council recently voted to pay a prominent artist to create an abstract sculpture for the town square. Critics of this decision protested that town residents tend to dislike most abstract art, and any art in the town square should reflect their tastes. But a town council spokesperson dismissed this criticism, pointing out that other public abstract sculptures that the same sculptor has installed in other cities have been extremely popular with those cities' local residents.
The statements above most strongly suggest that the main point of disagreement between the critics and the spokesperson is whether
选项:
A、
A. it would have been reasonable to consult town residents on the decision
B、
B. most Sumpton residents will find the new sculpture to their taste
C、
C. abstract sculptures by the same sculptor have truly been popular in other cities
D、
D. a more traditional sculpture in the town square would be popular among local residents
E、
E. public art that the residents of Sumpton would find desirable would probably be found desirable by the residents of other cities
答案:
B
1答疑
[Sentence Correction]
试题详情
题目：
The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of DDT was sharply restricted in the early 1970's.
选项:
A、
A. extinction; its numbers are now five times greater than
B、
B. extinction; its numbers are now five times more than
C、
C. extinction, their numbers now fivefold what they were
D、
D. extinction, now with fivefold the numbers they had
E、
E. extinction, now with numbers five times greater than
答案:
A
1答疑
[Sentence Correction]
试题详情
题目：
Since 1992, in an attempt to build up the Atlantic salmon population in each of the seven rivers in which salmon still spawn, state officials in Maine have stocked them with fry raised in hatcheries from eggs produced by wild fish found in that particular river.
选项:
A、them
B、the river
C、the rivers
D、each river
E、that river
答案:
D
1答疑
[Sentence Correction]
试题详情
题目：
The Senate approved immigration legislation that would grant permanent residency to millions of aliens currently residing here and if employers hired illegal aliens they would be penalized.
选项:
A、if employers hired illegal aliens they would be penalizedhiring illegal aliens would be a penalty for employers
B、penalize employers who hire illegal aliens
C、penalizing employers hiring illegal aliens
D、employers to be penalized for hiring illegal aliens
答案:
C
1答疑
[Reading Comprehension]
试题详情
文章：
| Line | Conodonts, the spiky phosphatic remains (bones |
| and teeth composed of calcium phosphate) of | |
| tiny marine animals that probably appeared about | |
| 520 million years ago, were once among the most | |
| (5) | controversial of fossils. Both the nature of the |
| organism to which the remains belonged and the | |
| function of the remains were unknown. However, | |
| since the 1981 discovery of fossils preserving not | |
| just the phosphatic elements but also other remains | |
| (10) | of the tiny soft-bodied animals (also called conodonts) |
| that bore them, scientists’ reconstructions of the | |
| animals’ anatomy have had important implications | |
| for hypotheses concerning the development of the | |
| vertebrate skeleton. | |
| (15) | The vertebrate skeleton had traditionally been |
| regarded as a defensive development, champions of | |
| this view postulating that it was only with the much | |
| later evolution of jaws that vertebrates became | |
| predators. The first vertebrates, which were soft- | |
| (20) | bodied, would have been easy prey for numerous |
| invertebrate carnivores, especially if these early | |
| vertebrates were sedentary suspension feeders. | |
| Thus, traditionalists argued, these animals developed | |
| coverings of bony scales or plates, and teeth were | |
| (25) | secondary features, adapted from the protective |
| bony scales. Indeed, external skeletons of this | |
| type are common among the well-known fossils of | |
| ostracoderms, jawless vertebrates that existed from | |
| approximately 500 to 400 million years ago. | |
| (30) | However, other paleontologists argued that many of |
| the definitive characteristics of vertebrates, such as | |
| paired eyes and muscular and skeletal adaptations | |
| for active life, would not have evolved unless the | |
| first vertebrates were predatory. Teeth were more | |
| (35) | primitive than external armor according to this view, |
| and the earliest vertebrates were predators. | |
| The stiffening notochord along the back of the | |
| body, V-shaped muscle blocks along the sides, | |
| and posterior tail fins help to identify conodonts as | |
| (40) | among the most primitive of vertebrates. The lack of |
| any mineralized structures apart from the elements | |
| in the mouth indicates that conodonts were more | |
| primitive than the armored jawless fishes such as the | |
| ostracoderms. It now appears that the hard parts that | |
| (45) | first evolved in the mouth of an animal improved its |
| efficiency as a predator, and that aggression rather | |
| than protection was the driving force behind the origin | |
| of the vertebrate skeleton. |
题目：
The second paragraph in the passage serves primarily to
选项:
A、outline the significance of the 1981 discovery of conodont remains to the debate concerning the development of the vertebrate skeleton
B、contrast the traditional view of the development of the vertebrate skeleton with a view derived from the 1981 discovery of conodont remains
C、contrast the characteristics of the ostracoderms with the characteristics of earlier soft-bodied vertebrates
D、explain the importance of the development of teeth among the earliest vertebrate predators
E、present the two sides of the debate concerning the development of the vertebrate skeleton
答案:
E
1答疑
[Data Sufficiency]
试题详情
题目：
Line ℓ lies in the xy-plane and does not pass through the origin. What is the slope of line ℓ ?
- The x-intercept of line ℓ is twice the y-intercept of line ℓ.
- The x- and y-intercepts of line ℓ are both positive.
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
0评分
1156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
3299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
3645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
1213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
2785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
1903浏览
0评分
1224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
1288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
305052浏览
0评分
312178浏览
