问答

8答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

In the past several years, astronomers have detected more than 80 massive planets, most of them as large or larger than Jupiter, which circle other stars.

选项:

A、 most of them as large or larger than Jupiter, which circle
B、 most of them as large or larger than Jupiter and circling
C、 most of them at least as large as Jupiter, circling
D、 mostly at least as large as Jupiter, which circle
E、 mostly as large or larger than Jupiter, circling

答案:

C
8答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

The single-family house constructed by the Yana, a Native American people who lived in what is now northern California, was conical in shape, its framework of poles overlaid with slabs of bark, either cedar or pine, and banked with dirt to a height of three to four feet.

选项:

A、banked with dirt to a height of
B、banked with dirt as high as that of
C、banked them with dirt to a height of
D、was banked with dirt as high as
E、was banked with dirt as high as that of

答案:

A
8答疑

[Critical Reasoning]

登录查看答疑

试题详情

题目：

Many residents of Calovia are committed to using products containing recycled materials.  Soon these consumers will get help in identifying such products from a book being published by the Calovian government.  The book offers a comprehensive listing, by product type and brand, of goods sold in Calovia that contain recycled material.  Therefore, publication of the book will almost certainly increase the use of products containing recycled materials in Calovia.
 
Which of the following, if true, most strengthens the argument?

选项:

A、Proceeds from the sale of the book are not expected to exceed the cost of its publication.
B、For numerous types of products, there are many brands that use recycled materials, although their manufacturers and distributors do nothing to advertise those brands' recycled content.
C、For many materials, such as plastics, the recycling process results in a lower grade of material with a correspondingly different range of uses.
D、For many types of products listed in the book, all the brands available in Calovia use recycled materials.
E、Many manufacturers of products that contain recycled materials vary the proportion of recycled materials in those products in response to changes in price and availability.

答案:

B
8答疑

[Critical Reasoning]

登录查看答疑

试题详情

题目：

Insect infestations in certain cotton-growing regions of the world have caused dramatic increases in the price of cotton on the world market.  By contrast, the price of soybeans has long remained stable.  Knowing that cotton plants mature quickly, many soybean growers in Ortovia plan to cease growing soybeans and begin raising cotton instead, thereby taking advantage of the high price of cotton to increase their income significantly, at least over the next several years.
 
Which of the following, if true, most seriously weakens the plan's chances for success?

选项:

A、The cost of raising soybeans has increased significantly over the past several years and is expected to continue to climb.
B、Tests of a newly developed, inexpensive pesticide have shown it to be both environmentally safe and effective against the insects that have infested cotton crops.
C、In the past several years, there has been no sharp increase in the demand for cotton and for goods made out of cotton.
D、Few consumers would be willing to pay significantly higher prices for cotton goods than they are now paying.
E、The species of insect that has infested cotton plants has never been known to attack soybean plants.

答案:

B
8答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

At the turn of the twentieth century, forest covering as much as 90 percent of Thailand and accommodating as many as 300,000 elephants, a third of them domesticated and performing various essential tasks.

选项:

A、covering as much as 90 percent of Thailand and accommodating as many as 300,000 elephants, a third of them
B、covering as much as 90 percent of Thailand accommodated as much as 300,000 elephants, and a third of them were
C、covered as much as 90 percent of Thailand and accommodated as much as 300,000 elephants, with a third
D、covered as much as 90 percent of Thailand and accommodated as many as 300,000 elephants, a third of them
E、covered as much as 90 percent of Thailand and accommodating as many as 300,000 elephants, with a third of them

答案:

D
8答疑

[Reading Comprehension]

登录查看答疑

试题详情

文章：

    One proposal for preserving rain forests is to promote the adoption of new agricultural technologies, such as improved plant varieties and use of chemical herbicides, which would increase productivity and slow deforestation by reducing demand for new cropland. Studies have shown that farmers in developing countries who have achieved certain levels of education, wealth, and security of land tenure are more likely to adopt such technologies. But these studies have focused on villages with limited land that are tied to a market economy rather than on the relatively isolated, selfsufficient communities with ample land characteristic of rain-forest regions. A recent study of the Tawahka people of the Honduran rain forest found that farmers with some formal education were more likely to adopt improved plant varieties but less likely to use chemical herbicides and that those who spoke Spanish (the language of the market economy) were more likely to adopt both technologies. Nonland wealth was also associated with more adoption of both technologies, but availability of uncultivated land reduced the incentive to employ the productivity-enhancing technologies. Researchers also measured land-tenure security: in Tawahka society, kinship ties are a more important indicator of this than are legal property rights, so researchers measured it by a household's duration of residence in its village. They found that longer residence correlated with more adoption of improved plant varieties but less adoption of chemical herbicides.

题目：

The primary purpose of the passage is to

选项:

A、evaluate the likelihood that a particular proposal, if implemented, would ultimately succeed in achieving its intended result
B、question the assumption that certain technological innovations are the most effective means of realizing a particular environmental objective
C、discuss the progress of efforts to encourage a particular traditional society to adopt certain modern agricultural methods
D、present the results of new research suggesting that previous findings concerning one set of conditions may not be generalizable to another set of conditions
E、weigh the relative importance of three factors in determining whether a particular strategy will be successful

答案:

D
8答疑

[Critical Reasoning]

登录查看答疑

试题详情

题目：

An overwhelming proportion of the most productive employees at SaleCo's regional offices work not eight hours a day, five days a week, as do other SaleCo employees, but rather ten hours a day, four days a week, with Friday off.  Noting this phenomenon, SaleCo's president plans to increase overall productivity by keeping the offices closed on Fridays and having all employees work the same schedule—ten hours a day, four days a week.
 
Which of the following, if true, provides the most reason to doubt that the president's plan, if implemented, will achieve its stated purpose?

选项:

A、Typically, a SaleCo employee's least productive hours in the workplace are the early afternoon hours.
B、None of the employees who work four days a week had volunteered to work that schedule, but all were assigned to it by their supervisors.
C、Working ten hours a day has allowed the most productive employees to work two hours alone each day in their respective offices relatively undisturbed by fellow employees.
D、Employees at SaleCo are compensated not on the basis of how many hours a week they work but on the basis of how productive they are during the hours they are at work.
E、Those SaleCo employees who have a four-day workweek do not take any of their office work to do at home on Fridays.

答案:

C
8答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

In Japan, a government advisory committee called for the breakup of Nippon Telephone and Telegraph Company, the largest telephone company in the world, so it would be two local phone companies and one long-distance provider.

选项:

A、In Japan, a government advisory committee called for the breakup of Nippon Telephone and Telegraph Company, the largest telephone company in the world, so it would be
B、The breakup of the world's largest telephone company, Nippon Telephone and Telegraph Company, was called for by a government advisory committee in Japan, so it would be
C、A government advisory committee in Japan called for the breakup of Nippon Telephone and Telegraph Company, the world's largest telephone company, into
D、The breakup of Nippon Telephone and Telegraph Company, the world's largest telephone company, was called for by a government advisory committee in Japan, so it would be
E、Called for by a government advisory committee, the breakup of Nippon Telephone and Telegraph Company in Japan, the world's largest telephone company, was to be into

答案:

C
8答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

A Swiss government panel recommended that the country sell about half its gold reserves and this raised fears of other countries that do the same and inundate the market.

选项:

A、reserves and this raised fears of other countries that
B、reserves, which, as a result, raised fears of other countries that
C、reserves; as a result, they feared that other countries would
D、reserves, with fears raised that other countries would
E、reserves, raising fears that other countries would

答案:

E
8答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Discussion of greenhouse effects have usually had as a focus the possibility of Earth growing warmer and to what extent it might, but climatologists have indicated all along that precipitation, storminess, and temperature extremes are likely to have the greatest impact on people.

选项:

A、Discussion of greenhouse effects have usually had as a focus the possibility of Earth growing warmer and to what extent it might,
B、Discussion of greenhouse effects has usually had as its focus whether Earth would get warmer and what the extent would be,
C、Discussion of greenhouse effects has usually focused on whether Earth would grow warmer and to what extent,
D、The discussion of greenhouse effects have usually focused on the possibility of Earth getting warmer and to what extent it might,
E、The discussion of greenhouse effects has usually focused on whether Earth would grow warmer and the extent that is,

答案:

C
0评分
315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
351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
300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
656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
574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
383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
401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
85137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
92220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
1评分
94181浏览

[Undefined]

登录查看答疑
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?
点我领取
免费专项课程
 在线咨询