问答

2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Yellow jackets number among the 900 or so species of the world's social wasps, wasps living in a highly cooperative and organized society where they consist almost entirely of females—the queen and her sterile female workers.

选项:

A、wasps living in a highly cooperative and organized society where they consist almost entirely of
B、wasps that live in a highly cooperative and organized society consisting almost entirely of
C、which means they live in a highly cooperative and organized society, almost all
D、which means that their society is highly cooperative, organized, and it is almost entirely
E、living in a society that is highly cooperative, organized, and it consists of almost all

答案:

B
2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Antarctica receives more solar radiation than does any other place on Earth, yet the temperatures are so cold and the ice cap is reflective, so that little polar ice melts during the summer; otherwise, the water levels of the oceans would rise 250 feet and engulf most of the world's great cities.

选项:

A、is reflective, so that little polar ice melts during the summer; otherwise,
B、is so reflective that little of the polar ice melts during the summer; were it to do so,
C、so reflective that little polar ice melts during the summer, or else
D、reflective, so that little of the polar ice melts during the summer, or
E、reflects so that little of the polar ice melts during the summer; if it did

答案:

B
2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Salt deposits and moisture threaten to destroy the Mohenjo-Daro excavation in Pakistan, the site of an ancient civilization that flourished at the same time as the civilizations in the Nile Delta and the river valleys of the Tigris and Euphrates.

选项:

A、that flourished at the same time as the civilizations
B、that had flourished at the same time as had the civilizations
C、that flourished at the same time those had
D、flourishing at the same time as those did
E、flourishing at the same time as those were

答案:

A
2答疑

[Problem Solving]

登录查看答疑

试题详情

题目：

If x percent of 40 is y, then 10x equals

选项:

A、4y
B、10y
C、25y
D、100y
E、400y

答案:

C
2答疑

[Problem Solving]

登录查看答疑

试题详情

题目：

How many different 6-letter sequences are there that consist of 1 A , 2 B 's, and 3 C 's ?

选项:

A、6
B、60
C、120
D、360
E、720

答案:

B
2答疑

[Critical Reasoning]

登录查看答疑

试题详情

题目：

According to a review of 61 studies of patients suffering from severely debilitating depression, a large majority of the patients reported that missing a night's sleep immediately lifted their depression.  Yet sleep-deprivation is not used to treat depression even though the conventional treatments, which use drugs and electric shocks, often have serious side effects.
 
Which of the following, if true, best explains the fact that sleep-deprivation is not used as a treatment for depression?

选项:

A、For a small percentage of depressed patients, missing a night's sleep induces a temporary sense of euphoria.
B、Keeping depressed patients awake is more difficult than keeping awake people who are not depressed.
C、Prolonged loss of sleep can lead to temporary impairment of judgment comparable to that induced by consuming several ounces of alcohol.
D、The dramatic shifts in mood connected with sleep and wakefulness have not been traced to particular changes in brain chemistry.
E、Depression returns in full force as soon as the patient sleeps for even a few minutes.

答案:

E
2答疑

[Critical Reasoning]

登录查看答疑

试题详情

题目：

Manufacturing plants in Arundia have recently been acquired in substantial numbers by investors from abroad. Arundian politicians are proposing legislative action to stop such investment, justifying the proposal by arguing that foreign investors, opportunistically exploiting a recent fall in the value of the Arundian currency, were able to buy Arundian assets at less than their true value.

Which of the following, if true, casts the most serious doubt on the adequacy of the Arundian politicians' justification for the proposed legislation?

选项:

A、The Arundian government originally welcomed the fall in the value of the Arundian currency because the fall made Arundian exports more competitive on international markets.
B、Foreign investors who acquired Arundian manufacturing plants generally did so with no intention of keeping and running those plants over the long term.
C、Without the recent fall in the value of the Arundian currency, many of the Arundian assets bought by foreign investors would have been beyond the financial reach of those investors.
D、In Concordia, a country broadly similar to Arundia, the share of manufacturing assets that is foreign-controlled is 60 percent higher than it is in Arundia.
E、The true value of an investment is determined by the value of the profits from it, and the low value of the Arundian currency has depressed the value of any profits earned by foreign investors from Arundian assets.

答案:

E
2答疑

[Problem Solving]

登录查看答疑

试题详情

题目：

A teacher gave the same test to three history classes:  A , B , and C .  The average (arithmetic mean) scores for the three classes were 65, 80, and 77, respectively.  The ratio of the numbers of students in each class who took the test was 4 to 6 to 5, respectively.  What was the average score for the three classes combined?

选项:

A、74
B、75
C、76
D、77
E、78

答案:

B
2答疑

[Data Sufficiency]

登录查看答疑

试题详情

题目：

From May 1 to May 30 in the same year, the balance in a checking account increased. What was the balance in the checking account on May 30?
(1)   If, during this period of time, the increase in the balance in the checking account had been 12 percent, then the balance in the account on May 30 would have been $504
(2)   During this period of time, the increase in the balance in the checking account was 8 percent.

选项:

答案:

C
2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Researchers now regard interferon as not a single substance, but it is rather a biological family of complex molecules that play an important, though not entirely defined, role in the immune system.

选项:

A、as not a single substance, but it is rather a biological family of complex molecules that play
B、as not a single substance but as a biological family of complex molecules playing
C、not as a single substance but as a biological family of complex molecules that play
D、not to be a single substance but rather a biological family of complex molecules playing
E、not as a single substance but instead as being a biological family of complex molecules that play

答案:

C
0评分
385浏览

[Undefined]

登录查看答疑
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？
0评分
1385浏览

[Undefined]

登录查看答疑
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
1552浏览

[Undefined]

登录查看答疑
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
595浏览

[Undefined]

登录查看答疑
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
1383浏览

[GWD]

登录查看答疑
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
976浏览

[OG]

登录查看答疑
The primary purpose of the passage is to
为什么选E不选B
0评分
651浏览

[Undefined]

登录查看答疑
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
666浏览

[Undefined]

登录查看答疑
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
157156浏览

[Undefined]

登录查看答疑
Analytical!
请问may老师，这题该用什么思路来做？
0评分
164265浏览

[Undefined]

登录查看答疑
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
点我领取
免费专项课程
 在线咨询