问答

4答疑

[Argument Essay]

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题目：

Read the statement and the instructions that follow it,and then make any notes that will help you plan your response.Begin typing your response in the box at the bottom of the screen.
 
The following appeared as part of a newspaper editorial.
 
"Two years ago Nova High School began to use interactive computer instruction in three academic subjects. The school dropout rate declined immediately, and last year's graduates have reported some impressive achievements in college. In future budgets the school board should use a greater portion of the available funds to buy more computers, and all schools in the district should adopt interactive computer instruction throughout the curriculum:"
 
Discuss how well reasoned.., etc.

选项:

答案:

4答疑

[Critical Reasoning]

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文章：

Delta Products Inc. has recently switched at least partly from older technologies using fossil fuels to new technologies powered by electricity. The question has been raised whether it can be concluded that for a given level of output Delta's operation now causes less fossil fuel to be consumed than it did formerly. The answer, clearly, is yes, since the amount of fossil fuel used to generate the electricity needed to power the new technologies is less than the amount needed to power the older technologies, provided level of output is held constant.

题目：

In the argument given, the two boldfaced portions play which of the following roles?

选项:

A、The first identifies the content of the conclusion of the argument; the second provides support for that conclusion.The first provides support for the conclusion of the argument; the second identifi es the content of that conclusion
B、The first states the conclusion of the argument; the second calls that conclusion into question. 
C、The first provides support for the conclusion of the argument; the second calls that conclusion into question
D、Each provides support for the conclusion of the argument.

答案:

B
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[Critical Reasoning]

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题目：

Unless tiger hunting decreases, tigers will soon be extinct in the wild.  The countries in which the tigers' habitats are located are currently debating joint legislation that would ban tiger hunting.  Thus, if these countries can successfully enforce this legislation, the survival of tigers in the wild will be ensured.
 
The reasoning in the argument is most vulnerable to criticism on the grounds that the argument

选项:

A、assumes without sufficient warrant that a ban on tiger hunting could be successfully enforced
B、considers the effects of hunting on tigers without also considering the effects of hunting on other endangered animal species
C、fails to take into account how often tiger hunters are unsuccessful in their attempts to kill tigers
D、neglects to consider the results of governmental attempts in the past to limit tiger hunting
E、takes the removal of an impediment to the tigers' survival as a guarantee of their survival

答案:

E
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[Sentence Correction]

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题目：

There are hopeful signs that we are shifting away from our heavy reliance on fossil fuels:  more than ten times as much energy is generated through wind power now than it was in 1990.

选项:

A、generated through wind power now than it was
B、generated through wind power now as it was
C、generated through wind power now as was the case
D、now generated through wind power as it was
E、now generated through wind power than was the case

答案:

C
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[Problem Solving]

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题目：

Box W and Box V each contain several blue sticks and red sticks, and all of the red sticks have the same length. The length of each red stick is 18 inches less than the average length of the sticks in Box W and 6 inches greater than the average length of the sticks in Box V.  What is the average (arithmetic mean) length, in inches, of the sticks in Box W minus the average length, in inches, of the sticks in Box V?

选项:

A、3
B、6
C、12
D、18
E、24

答案:

E
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[Sentence Correction]

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题目：

To map Earth's interior, geologists use a network of seismometers to chart seismic waves that originate in the earth's crust and ricochet around its interior, most rapidly traveling through cold, dense regions and slower through hotter rocks.

选项:

A、interior, most rapidly traveling through cold, dense regions and slower
B、interior, which travel most rapidly through cold, dense regions, and more slowly
C、interior, traveling most rapidly through cold, dense regions and more slowly
D、interior and most rapidly travel through cold, dense regions, and slower
E、interior and that travel most rapidly through cold, dense regions and slower

答案:

C
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[Reading Comprehension]

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文章：

    Diamonds are almost impossible to detect directly because they are so rare: very rich kimberlite pipes, the routes through which diamonds rise, may contain only three carats of diamonds per ton of kimberlite. Kimberlite begins as magma in Earth's mantle (the layer between the crust and the core). As the magma smashes through layers of rock, it rips out debris, creating a mix of liquid and solid material. Some of the solid material it brings up may come from a so-called diamond-stability field, where conditions of pressure and temperature are conducive to the formation of diamonds. If diamonds are to survive, though, they must shoot toward Earth's surface quickly. Otherwise, they revert to graphite or burn. Explorers seeking diamonds look for specks of "indicator minerals" peculiar to the mantle but carried up in greater quantities than diamonds and eroded out of kimberlite pipes into the surrounding land. The standard ones are garnets, chromites, and ilmenites. One can spend years searching for indicators and tracing them back to the pipes that are their source; however, 90 percent of kimberlite pipes found this way are barren of diamonds, and the rest are usually too sparse to mine.

    In the 1970's the process of locating profitable pipes was refined by focusing on the subtle differences between the chemical signatures of indicator minerals found in diamond-rich pipes as opposed to those found in barren pipes. For example, G10 garnets, a type of garnet typically found in diamond-rich pipes, are lower in calcium and higher in chrome than garnets from barren pipes. Geo-chemists John Gurney showed that garnets with this composition were formed only in the diamond-stability field; more commonly found versions came from elsewhere in the mantle. Gurney also found that though ilmenites did not form in the diamond-stability field, there was a link useful for prospectors: when the iron in ilmenite was highly oxidized, its source pipe rarely contained any diamonds. He reasoned that iron took on more or less oxygen in response to conditions in the kimberlitic magma itself—mainly in response to heat and the available oxygen. When iron became highly oxidized, so did diamonds; that is, they vaporized into carbon dioxide.

题目：

The primary purpose of the passage is to

选项:

A、discuss an objection to Gurney's theories about the uses of indicator minerals
B、explore the formation of diamonds and the reasons for their scarcity
C、analyze the importance of kimberlite pipes in the formation of diamonds
D、define the characteristics of indicator minerals under differing conditions
E、explain a method of determining whether kimberlite pipes are likely to contain diamonds

答案:

E
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[Sentence Correction]

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题目：

The new image of Stone Age people as systematic hunters of large animals, rather than merely scavenging for meat, have emerged from the examination of tools found in Germany, including three wooden spears that archaeologists believe to be about 400,000 years old.

选项:

A、merely scavenging for meat, have emerged from the examination of tools found in Germany, including
B、as merely scavenging for meat, have emerged from examining tools found in Germany, which include
C、as mere meat scavengers, has emerged from examining tools found in Germany that includes
D、mere scavengers of meat, has emerged from the examination of tools found in Germany, which includes
E、mere scavengers of meat, has emerged from the examination of tools found in Germany, including

答案:

E
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[Critical Reasoning]

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题目：

The violent crime rate (number of violent crimes per 1,000 residents) in Meadowbrook is 60 percent higher now than it was four years ago.  The corresponding increase for Parkdale is only 10 percent.  These figures support the conclusion that residents of Meadowbrook are more likely to become victims of violent crime than are residents of Parkdale.
 
The argument above is flawed because it fails to take into account

选项:

A、changes in the population density of both Parkdale and Meadowbrook over the past four years
B、how the rate of population growth in Meadowbrook over the past four years compares to the corresponding rate for Parkdale
C、the ratio of violent to nonviolent crimes committed during the past four years in Meadowbrook and Parkdale
D、the violent crime rates in Meadowbrook and Parkdale four years ago
E、how Meadowbrook's expenditures for crime prevention over the past four years compare to Parkdale's expenditures

答案:

D
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[Critical Reasoning]

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题目：

The total market value of real estate in Altonville has steadily declined over the past four years.  This decline has meant that the overall figure on which the city's property tax is based—the assessed value of that real estate—has also declined.  The percentage of assessed value that was paid as property taxes to the city, however, did not change from year to year during this period.
 
The information above most strongly supports which of the following?

选项:

A、The percentage of Altonville's yearly revenue that comes from money collected in property taxes did not change over the past four years.
B、The percentage of Altonville's yearly revenue that comes from money collected in property taxes has declined steadily over the past four years.
C、The amount of revenue that Altonville collected from property taxes was lower last year than it was four years ago.
D、During the past four years, Altonville officials increased tax rates on other sources of revenue such as retail sales and business profits.
E、Altonville will soon require property owners to pay a higher percentage of the assessed value of their property as property tax.

答案:

C
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[Undefined]

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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？
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[Undefined]

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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
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2634浏览

[Undefined]

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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
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[Undefined]

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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？
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2112浏览

[GWD]

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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
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[OG]

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The primary purpose of the passage is to
为什么选E不选B
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[Undefined]

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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
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[Undefined]

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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
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[Undefined]

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Analytical!
请问may老师，这题该用什么思路来做？
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[Undefined]

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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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