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题目：

When an active tooth in the shark's jaws is lost or worn down, many spare teeth lie in seemingly limitless reserve, each of which are ready to slide into the appropriate position.

选项:

A、When an active tooth in the shark's jaws is lost or worn down, many spare teeth lie in seemingly limitless reserve, each of which are ready to slide into the appropriate position.
B、Whenever an active tooth is lost or worn down, many spare teeth lie in seemingly limitless reserve in the shark's jaws, which are each ready to slide into the appropriate position.
C、Many spare teeth lie in seemingly limitless reserve in the shark's jaws, each one of which are ready to slide into the appropriate position when an active tooth is lost or worn down.
D、The many spare teeth lying in seemingly limitless reserve in the shark's jaws, each one of which is ready to slide into the appropriate position whenever an active tooth is lost or worn down.
E、In the shark's jaws, many spare teeth lie in seemingly limitless reserve, each one ready to slide into the appropriate position whenever an active tooth is lost or worn down.

答案:

E
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题目：

Excavations of the Roman city of Sepphoris have uncovered numerous detailed mosaics depicting several readily identifiable animal species:  a hare, a partridge, and various Mediterranean fish.  Oddly, most of the species represented did not live in the Sepphoris region when these mosaics were created.  Since identical motifs appear in mosaics found in other Roman cities, however, the mosaics of Sepphoris were very likely created by traveling artisans from some other part of the Roman Empire.
 
Which of the following is an assumption on which the argument depends?

选项:

A、The Sepphoris mosaics are not composed exclusively of types of stones found naturally in the Sepphoris area.
B、There is no single region to which all the species depicted in the Sepphoris mosaics are native.
C、No motifs appear in the Sepphoris mosaics that do not also appear in the mosaics of some other Roman city.
D、All of the animal figures in the Sepphoris mosaics are readily identifiable as representations of known species.
E、There was not a common repertory of mosaic designs with which artisans who lived in various parts of the Roman Empire were familiar.

答案:

E
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For most people, the left half of the brain controls linguistic capabilities, but some people have their language centers in the right half.  When a language center of the brain is damaged, for example by a stroke, linguistic capabilities are impaired in some way.  Therefore, people who have suffered a serious stroke on the left side of the brain without suffering any such impairment must have their language centers in the right half.
 
Which of the following is an assumption on which the reasoning in the argument above depends?

选项:

A、No part of a person's brain that is damaged by a stroke ever recovers.
B、Impairment of linguistic capabilities does not occur in people who have not suffered any damage to any language center of the brain.
C、Strokes tend to impair linguistic capabilities more severely than does any other cause of damage to language centers in the brain.
D、If there are language centers on the left side of the brain, any serious stroke affecting that side of the brain damages at least one of them.
E、It is impossible to determine which side of the brain contains a person's language centers if the person has not suffered damage to either side of the brain.

答案:

D
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Lyme disease is caused by a bacterium transmitted to humans by deer ticks.  Generally deer ticks pick up the bacterium while in the larval stage from feeding on infected white-footed mice.  However, certain other species on which the larvae feed do not harbor the bacterium.  Therefore, if the population of these other species were increased, the number of ticks acquiring the bacterium―and hence the number of people contracting Lyme disease—would likely decline.
 
Which of the following, if true, most strengthens the argument?癮

选项:

A、Ticks do not suffer any adverse consequences from carrying the bacterium that causes Lyme disease in humans.
B、There are no known cases of a human's contracting Lyme disease through contact with white-footed mice.
C、A deer tick feeds only once while in the larval stage.
D、A single host animal can be the source of bacteria for many tick larvae.
E、None of the other species on which deer tick larvae feed harbor other bacteria that ticks transmit to humans.

答案:

C
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题目：

The nineteenth-century chemist Humphry Davy presented the results of his early experiments in his "Essay on Heat and Light," a critique of all chemistry since Robert Boyle as well as a vision of a new chemistry that Davy hoped to found.

选项:

A、a critique of all chemistry since Robert Boyle as well as a vision of a
B、a critique of all chemistry following Robert Boyle and also his envisioning of a
C、a critique of all chemistry after Robert Boyle and envisioning as well
D、critiquing all chemistry from Robert Boyle forward and also a vision of
E、critiquing all the chemistry done since Robert Boyle as well as his own  envisioning of

答案:

A
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Construction of the Roman Colosseum, which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian, was completed a decade later, during the reign of Titus, who opened the Colosseum with a one-hundred-day cycle of religious pageants, gladiatorial games, and spectacles.

选项:

A、which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian,
B、officially known as the Flavian Amphitheater, begun in A.D. 69, during the reign of Vespasian, and
C、which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian, and
D、officially known as the Flavian Amphitheater and begun in A.D. 69, during the reign of Vespasian it
E、officially known as the Flavian Amphitheater, which was begun in A.D. 69, during the reign of Vespasian, and

答案:

C
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The results of the company's cost- cutting measures are evident in its profits, which increased five percent during the first three months of this year after it fell over the last two years.

选项:

A、which increased five percent during the first three months of this year after it fell
B、which had increased five percent during the first three months of this year after it had fallen
C、which have increased five percent during the first three months of this year after falling
D、with a five percent increase during the first three months of this year after falling
E、with a five percent increase during the first three months of this year after having fallen

答案:

C
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A major network news organization experienced a drop in viewership in the week following the airing of a controversial report on the economy. The network also received a very large number of complaints regarding the report. The network, however, maintains that negative reactions to the report had nothing to do with its loss of viewers.

Which of the following, if true, most strongly supports the network’s position?

选项:

A、The other major network news organizations reported similar reductions in viewership during the same week.
B、The viewers who registered complaints with the network were regular viewers of the news organization’s programs.
C、Major network news organizations publicly attribute drops in viewership to their own reports only when they receive complaints about those reports.
D、This was not the first time that this network news organization has aired a controversial report on the economy that has inspired viewers to complain to the network.
E、Most network news viewers rely on network news broadcasts as their primary source of information regarding the economy.

答案:

A
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Outlining his strategy for nursing the troubled conglomerate back to health, the chief executive's plans were announced on Wednesday for cutting the company's huge debt by selling nearly $12 billion in assets over the next 18 months.

选项:

A、executive's plans were announced on Wednesday for cutting the company's huge debt by selling nearly $12 billion in assets over the next 18 months
B、executive's plans, which are to cut the company's huge debt by selling nearly $12 billion in assets over the next 18 months, were announced on Wednesday
C、executive's plans for cutting the company's huge debt by selling nearly $12 billion in assets over the next 18 months were announced on Wednesday
D、executive announced plans Wednesday to cut the company's huge debt by selling nearly $12 billion in assets over the next 18 months
E、executive announced plans Wednesday that are to cut the company's huge debt by selling nearly $12 billion in assets over the next 18 months

答案:

D
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题目：

Because ethylene dibromide, a chemical used to fumigate grain, was blamed for the high rate of nerve damage suffered by people who work in grain-processing plants, many such plants switched to other chemical fumigants two years ago.  Since then, however, the percentage of workers at these plants who were newly diagnosed with nerve damage has not dropped significantly.  Therefore, either ethylene dibromide was wrongly blamed or else the new chemicals also cause nerve damage.
Which of the following is an assumption on which the argument depends?

选项:

A、If the new chemicals cause nerve damage, the nerve damage caused would be different from any nerve damage that ethylene dibromide may cause.
B、There are no chemical fumigants that are completely safe for workers in grain-processing plants.
C、If ethylene dibromide causes nerve damage, it does not take two years or longer for that damage to become detectable.
D、Workers at grain-processing plants typically continue to work there even after being diagnosed with nerve damage.
E、Workers at grain-processing plants that still use ethylene dibromide continue to have a high rate of nerve damage.

答案:

C
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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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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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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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[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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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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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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Analytical!
请问may老师，这题该用什么思路来做？
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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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Analytical!
请问老师，这道题为什么second part是”evidence”? 还有、不确定First part到底是background info还是premise?
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