问答

2答疑

[Critical Reasoning]

登录查看答疑

试题详情

题目：

During the earliest period of industrialization in Britain, steam engines were more expensive to build and operate than either windmills or water mills, the other practicable sources of power for factories. Yet despite their significant cost disadvantage, steam-powered factories were built in large numbers well before technical improvements brought their cost down. Furthermore, they were built even in regions where geographical conditions permitted the construction of wind- and water-powered factories close to major markets.

Which of the following, if true, most helps to explain the proliferation of steam-powered factories during the earliest period of industrialization in Britain?

选项:

A、In many areas of Britain, there were fewer steam-powered factories than wind- or water-powered factories in the earliest period of industrialization.
B、Unlike wind- or water-powered factories, steam-powered factories were fueled with coal, which sometimes had to be transported significant distances from the mine to the site of the factory.
C、It was both difficult and expensive to convert a factory from wind power or water power to steam power.
D、In the early period of industrialization, many goods sold in towns and cities could not be mass-produced in factories.
E、In Britain, the number of sites where a wind- or water-powered factory could be built was insufficient to provide for all of the demand for factory-produced goods at the time.

答案:

E
2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or an increase in volume if the gas is able to expand.

选项:

A、 When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or
B、 When the temperature of a gas is increased, it is accompanied either by an increase in pressure if it is enclosed in a container or
C、 When the temperature of a gas is increased, the increase is either accompanied by an increase in pressure if the gas is enclosed in a container or by
D、 Any increase in the temperature of a gas is either accompanied by an increase in pressure if it is enclosed in a container, or by
E、 Any increase in the temperature of a gas is accompanied either by an increase in pressure if the gas is enclosed in a container or by

答案:

E
2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

The use of the bar code, or Universal Product Code, which was created in part to enable supermarkets to process customers at a faster rate, has expanded beyond supermarkets to other retail outlets and have become readily accepted despite some initial opposition when it was first introduced in 1974.

选项:

A、have become readily accepted despite some initial opposition when it was first introduced in 1974
B、has become readily accepted despite some initial opposition when they were first introduced in 1974
C、have become readily accepted despite some initial opposition when first introduced in 1974
D、has become readily accepted despite some initial opposition when the bar code was first introduced in 1974
E、bar codes have become readily accepted despite some initial opposition when it was first introduced in 1974

答案:

D
2答疑

[Critical Reasoning]

登录查看答疑

试题详情

题目：

Archaeologists use technology to analyze ancient sites. It is likely that this technology will advance considerably in the near future, allowing archaeologists to gather more information than is currently possible. If they study certain sites now, they risk contaminating or compromising them for future studies. Therefore, in order to maximize the potential for gathering knowledge in the long run, a team of archaeologists plans to delay the examination of a newly excavated site.

Which of the following would be most useful to investigate for the purpose of evaluating the plan’s prospects for achieving its goal?

选项:

答案:

A
2答疑

[Critical Reasoning]

登录查看答疑

试题详情

题目：

Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times. It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides, since the airline made a special effort to improve other aspects of its service last year.

Which of the following, if true, most helps to explain the disproportionate increase in customer complaints?

选项:

答案:

D
2答疑

[Reading Comprehension]

登录查看答疑

试题详情

文章：

    The Gross Domestic Product. (GDP), which measures the dollar value of finished goods and services produced by an economy during a given period, serves as the chief indicator of the economic well-being of the United States. The GDP assumes that the economic significance of goods and services lies solely in their price, and that these goods and services add to the national well-being, not because of any intrinsic value they may possess, but simply because they were produced and bought. Additionally, only those goods and services involved in monetary transactions are included in the GDP. Thus, the GDP ignores the economic utility of such things as a clean environment and cohesive families and communities, It is therefore not merely coincidental, since nationalpolicies in capitalist and noncapitalist countries alike are dependent on indicators such as the GDP, that both the environment and the social structure have been eroded in recent decades not only does the GDP mask this erosion, it can actually portray it as an economic gain: an oil spill off a coastal region "adds" to the GDP because it generates commercial activity. In short, the nation's central measure of economic well-being works like a calculating machine that adds but cannot subtract.

题目：

Which of the following best describes the function of the second sentence of the passage (the highlighted text) in the context of the passage as a whole?

选项:

A、It describes an assumption about the GDP that is defended in the course of the passage.
B、It contributes to a discussion of the origins of the GDP.
C、It clarifies a common misconception about the use of the GDP.
D、It identifies a major flaw in the GDP.
E、It suggests a revision to the method of calculating the GDP.

答案:

A
2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Pioneered by scientists at Los Alamos National Laboratory, BEAM robots are not programmed to walk; instead they use brainlike circuits called neural networks to learn to walk through trial and error.

选项:

A、BEAM robots are not programmed to walk; instead they use brainlike circuits called neural networks to learn to walk through trial and error
B、BEAM robots learn to walk through trial and error by using brainlike circuits called neural networks instead of by programming them
C、BEAM robots are not being programmed to walk but instead using brainlike circuits called neural networks and learning to walk through trial and error
D、brainlike circuits called neural networks are used instead of programming for BEAM robots learning to walk through trial and error
E、brainlike circuits called neural networks are being used for BEAM robots that learn to walk through trial and error instead of being programmed

答案:

A
2答疑

[Reading Comprehension]

登录查看答疑

试题详情

文章：

Many United States companies believe that the rising cost of employees' health care benefits has hurt the country's competitive position in the global market by raising production costs and thus increasing the prices of exported and domestically sold goods.  As a result, these companies have shifted health care costs to employees in the form of wage deductions or high deductibles.  This strategy, however, has actually hindered companies' competitiveness.  For example, cost shifting threatens employees' health because many do not seek preventive screening.  Also, labor relations have been damaged:  the percentage of strikes in which health benefits were a major issue rose from 18 percent in 1986 to 78 percent in 1989.
 
Health care costs can be managed more effectively if companies intervene in the supply side of health care delivery just as they do with other key suppliers:  strategies used to procure components necessary for production would work in procuring health care.  For example, the make/buy decision--the decision whether to produce or purchase parts used in making a product--can be applied to health care.  At one company, for example, employees receive health care at an on-site clinic maintained by the company.  The clinic fosters morale, resulting in a low rate of employees leaving the company.  Additionally, the company has constrained the growth of health care costs while expanding medical services.

题目：

Which of the following, if true, would provide the most support for the author's view about intervening on the supply side of health care?

选项:

A、Most companies do not have enough employees to make on-site clinics cost-effective.
B、Many companies with on-site clinics offer their employees the option of going outside the company's system to obtain health care.
C、The costs of establishing and running an on-site clinic are demonstrably higher than the costs of paying for health care from an outside provider.
D、Companies with health care clinics find that employees are unwilling to assist in controlling the costs of health care.
E、Employees at companies with on-site clinics seek preventive screening and are thus less likely to delay medical treatment.

答案:

E
2答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Kudzu, an Asian vine that has grown rampantly in the southern United States since introducing it in the 1920s to thwart soil erosion, has overrun many houses and countless acres of roadside.

选项:

A、
A. that has grown rampantly in the southern United States since introducing it in the 1920s to thwart
B、
B. that has grown rampantly in the southern United States, since it was introduced in the 1920s for thwarting
C、
C. that has grown rampant in the southern United States since it was introduced in the 1920s to thwart
D、
D. growing rampant in the southern United States since introducing it in the 1920s for thwarting
E、
E. growing rampantly in the southern United States, since it was introduced in the 1920s to thwart

答案:

C
2答疑

[Critical Reasoning]

登录查看答疑

试题详情

文章：

In parts of South America, vitamin-A deficiency is a serious health problem, especially among children. In one region, agriculturists hope to improve nutrition by encouraging farmers to plant a new variety of sweet potato called SPK004 that is rich in betacarotene, which the body converts into vitamin A. The plan has good chances of success, since sweet potato is a staple of the region's diet and agriculture, and the varieties currently grown contain little beta-carotene.

题目：

Which of the following, if true, most strongly supports the prediction that the plan will succeed?

选项:

A、There are other vegetables currently grown in the region that contain more beta-carotene than the currently cultivated varieties of sweet potato do. The flesh of SPK004 differs from that of the currently cultivated sweet potatoes in color and texture, so traditional foods would look somewhat different when prepared from SPK004.
B、For successful cultivation of SPK004, a soil significantly richer in nitrogen is needed than is needed for the varieties of sweet potato currently cultivated in the region. 
C、There are no other varieties of sweet potato that are significantly richer in beta-carotene than SPK004 is. 
D、The currently cultivated varieties of sweet potato contain no important nutrients that SPK004 lacks. 

答案:

E
0评分
1129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
3201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
3541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
1181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
2705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
1863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
1197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
1254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
297470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
304598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