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[Sentence Correction]

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题目：

Problems at a California securities firm rippled through the penny-stock market, forcing at least one Floridabrokerage firm to stop trading, and it sent the shares
of several small companies tumbling

选项:

A、forcing at least one Florida brokerage firm to stop trading, and it sent
B、forcing at least one Florida brokerage firm to stop  trading and sending
C、forced at least one Florida brokerage firm to stop trading and sending
D、with at least one Florida brokerage firm forced to stop trading and sending
E、at least one Florida brokerage firm was forced to stop trading ,and it sent

答案:

B
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题目：

Tropical bats play important roles in the rain forest ecosystem, aiding in the dispersal of cashew, date, and fig seeds; pollinating banana, breadfruit, and mango trees; and indirectly help produce tequila by pollinating agave plants.

选项:

A、pollinating banana, breadfruit, and mango trees; and indirectly help produce
B、pollinating banana, breadfruit, and mango trees; and indirectly helping to produce
C、pollinating banana, breadfruit, and mango trees; and they indirectly help to produce
D、they pollinate banana, breadfruit, and mango trees; and indirectly help producing
E、they pollinate banana, breadfruit, and mango trees; indirectly helping the producing of

答案:

B
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题目：

Defense attorneys have occasionally argued that their clients' misconduct stemmed from a reaction to something ingested, but in attributing criminal or delinquent behavior to some food allergy, the perpetrators are in effect told that they are not responsible for their actions.

选项:

A、in attributing criminal or delinquent behavior to some food allergy,
B、if criminal or delinquent behavior is attributed to an allergy to some food,
C、in attributing behavior that is criminal or delinquent to an allergy to some food,
D、if some food allergy is attributed as the cause of criminal or delinquent behavior,
E、in attributing a food allergy as the cause of criminal or delinquent behavior,

答案:

B
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[Critical Reasoning]

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题目：

Many people suffer an allergic reaction to certain sulfites, including those that are commonly added to wine as preservatives. However, since there are several winemakers who add sulfites to none of the wines they produce, people who would like to drink wine but are allergic to sulfites can drink wines produced by these winemakers without risking an allergic reaction to sulfites.

Which of the following is an assumption on which the argument depends?

选项:

A、These winemakers have been able to duplicate the preservative effect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.
B、Not all forms of sulfite are equally likely to produce the allergic reaction.
C、Wine is the only beverage to which sulfites are commonly added.
D、Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.
E、Sulfites are not naturally present in the wines produced by these winemakers in amounts large enough to produce an allergic reaction in someone who drinks these wines.

答案:

E
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[Critical Reasoning]

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题目：

Business Consultant:  Some corporations shun the use of executive titles because they fear that the use of titles indicating position in the corporation tends to inhibit communication up and down the corporate hierarchy.  Since an executive who uses a title is treated with more respect by outsiders, however, use of a title can facilitate an executive's dealings with external businesses.  The obvious compromise is for these executives to use their corporate titles externally but not internally, since even if it is widely known that the corporation's executives use executive titles outside their organization, this knowledge does not by itself inhibit communication within the corporation.
 
In the consultant's reasoning, the two portions in boldface play which of the following roles?

选项:

A、The first presents an obstacle to achieving a certain goal; the second presents a reason for considering that goal to be undesirable.
B、The first is a consideration that has led to the adoption of a certain strategy; the second presents a reason against adopting that strategy.
C、The first describes a concern that the consultant dismisses as insignificant; the second is a consideration that serves as the basis for that dismissal.
D、The first is a belief for which the consultant offers support; the second is part of that support.
E、The first is a belief against which evidence is offered; the second is part of the evidence offered against that belief.

答案:

B
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题目：

The English physician Edward Jenner found that if experimental subjects were deliberately infected with cowpox, which caused only a mild illness, they are immune from smallpox.

选项:

答案:

E
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题目：

Elk now live almost solely in the Rocky Mountains, which would make it seem that elk are mountain dwellers, while they once ranged over virtually all of the continental United States except for a small strip in the extreme Southwest.

选项:

A、Elk now live almost solely in the Rocky Mountains, which would make it seem that elk are mountain dwellers, while
B、The fact that elk now live almost solely in the Rocky Mountains would make it seem that they are mountain dwellers, but
C、It would seem that elk would be mountain dwellers because of their living now solely almost in the Rocky Mountains, but still
D、Now living almost solely in the Rocky Mountains, it would seem that elk were mountain dwellers, although
E、It seems that elk would be mountain dwellers from the fact that they now live solely almost in the Rocky Mountains, since

答案:

B
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[Critical Reasoning]

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题目：

Though sucking zinc lozenges has been promoted as a treatment for the common cold, research has revealed no consistent effect.  Recently, however, a zinc gel applied nasally has been shown to greatly reduce the duration of colds.  Since the gel contains zinc in the same form and concentration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concentrate in the nose, not the mouth.
 
In order to evaluate the argument, it would be most helpful to determine which of the following?

选项:

A、Whether zinc is effective only against colds, or also has an effect on other virally caused diseases
B、Whether there are remedies that do not contain zinc but that, when taken orally, can reduce the duration of colds
C、Whether people who frequently catch colds have a zinc deficiency
D、Whether either the zinc gel or the lozenges contain ingredients that have an impact on the activity of the zinc
E、Whether the zinc gel has an effect on the severity of cold symptoms, as well as on their duration

答案:

D
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[Reading Comprehension]

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文章：

Most farmers attempting to control slugs and snails turn to baited slug poison, or molluscicide, which usually consists of a bran pellet containing either methiocarb or metaldehyde.  Both chemicals are neurotoxins that disrupt that part of the brain charged with making the mouth move in a coordinated fashion--the "central pattern generator"--as the slug feeds.  Thus, both neurotoxins, while somewhat effective, interfere with the slugs' feeding behavior and limit their ingestion of the poison, increasing the probability that some will stop feeding before receiving a lethal dose.  Moreover, slugs are not the only consumers of these poisons:  methiocarb may be toxic to a variety of species, including varieties of worms, carabid beetles, and fish.
 
Researchers are experimenting with an alternative compound based on aluminum, which may solve these problems, but this may well have a limited future as we learn more about the hazards of aluminum in the environment.  For example, some researchers suggest that acid rain kills trees by mobilizing aluminum in the soil, while others have noted that the human disease Alzheimer's is more prevalent in areas where levels of aluminum in the soil are high.  With farmers losing as much as 20 percent of their crops to slugs and snails even after treatment with currently available molluscicides, there is considerable incentive for researchers to come up with better and environmentally safer solutions.

题目：

The passage suggests that methiocarb and metaldehyde would be more effective as slug poisons if it were true that they

选项:

A、disrupt the slug's digestive processes rather than its reproductive functions
B、reduce the slug's ability to taste food
C、begin to affect the feeding behavior of a slug only after it has ingested a lethal dose
D、reach the central pattern generator more quickly
E、accumulate only in the central pattern generator rather than throughout the brain

答案:

C
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[Data Sufficiency]

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题目：

Joanna bought only $0.15 stamps and $0.29 stamps.  How many $0.15 stamps did she buy?
(1)     She bought $4.40 worth of stamps.
(2)     She bought an equal number of $0.15 stamps and $0.29 stamps.

选项:

答案:

A
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570浏览

[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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[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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720浏览

[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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[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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