问答

3答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Paper production accounts for approximately 40 percent of the world's industrial use of wood, and the market for paper is growing faster than it is for all major wood products.

选项:

A、 the market for paper is growing faster than it is for all
B、 the market for paper is growing faster than the market for all other
C、 the market for it is growing faster than it is for all other
D、 its market is growing faster than the market for all
E、 its market is growing faster than it is for all other

答案:

B
3答疑

[Reading Comprehension]

登录查看答疑

试题详情

题目：

Which of the following can be inferred from the passage concerning the environmentalists mentioned in line 8?

选项:

A、They are organized in opposition to the generation of income produced by the sale of ecological services.
B、They are fewer in number but better organized and better connected to the media than their opponents.
C、They have sometimes been charged with failing to use a particular strategy in their pursuit of conservational goals.
D、They have been in the forefront of publicizing the extent of worldwide environmental degradation.
E、They define environmental progress differently and more conservatively than do other organized groups of environmentalists.

答案:

C
3答疑

[Data Sufficiency]

登录查看答疑

试题详情

题目：

A box contains 10 light bulbs, fewer than half of which are defective. Two bulbs are to be drawn simultaneously from the box.  If n of the bulbs in box are defective, what is the value of n?
(1)   The probability that the two bulbs to be drawn will be defective is 1/15.
(2) The probability that one of the bulbs to be drawn will be defective and the other will not be defective is 7/15.

选项:

答案:

D
3答疑

[Problem Solving]

登录查看答疑

试题详情

题目：

A certain business produced x rakes each month form November through February and shipped rakes at the beginning of each month from March through October.  The business paid no storage costs for the rakes from November through February, but it paid storage costs of $0.10 per rake each month from March through October for the rakes that had not been shipped.  In terms of x, what was the total storage cost, in dollars, that the business paid for the rakes for the 12 months form November through October?

选项:

A、0.40x
B、1.20x
C、1.40x
D、1.60x
E、3.20x

答案:

C
3答疑

[Data Sufficiency]

登录查看答疑

试题详情

题目：

One kilogram of a certain coffee blend consists of x kilogram of type I coffee and y kilogram of type II coffee.  The cost of the blend is C dollars per kilogram, where C = 6.5x + 8.5y.  Is x0.8?
(1)     y0.15
(2)     C  7.30

选项:

答案:

B
3答疑

[Data Sufficiency]

登录查看答疑

试题详情

题目：

If x and y are positive, what is the value of x – y?
(1)     (x2 – y2) / (x + y) = 4
(2)     x + y = 7<

选项:

答案:

A
3答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

According to a 1996 study published in the Journal of Human Resources, Americans of Middle Eastern descent were twice as likely as was the national average to be self-employed.

选项:

A、 as was the national average to be self-employed
B、 as the average American to be self-employed
C、 as the national average that they would be self-employed
D、 to be self-employed than was the average American
E、 that they would be self-employed than was the national average

答案:

B
3答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Studying the fruit fly, a household nuisance but a time-honored experimental
subject, has enabled the secrets of how embryos develop to begin to be
unraveled by scientists,

选项:

A、Studying the fruit fly, a household nuisance but a time-honored experi-mental subject, has enabled the secrets of how embryos develop to begin to be unraveled by scientists.
B、By the study of the fruit fly, a household nuisance and also a time-honored experimental subject, it was possible for the secrets of how embryos develo0p to begin to be unraveled by scientists.
C、By studying a household nuisance but a time-honored experimental sub-ject, the fruit fly enabled scientists to begin to unravel the secrets of how embryos develop.
D、By studying the fruit fly, a household nuisance and also a time-honored experimental subject, the secrets of how embryos develop are begin-ning to be unraveled by scientists.
E、The study of the fruit fly, a household nuisance but a time-honored exper-imental subject, has enabled scientists to begin to unravel the secrets of how embryos develop.

答案:

E
3答疑

[Sentence Correction]

登录查看答疑

试题详情

题目：

Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago, pushing back by more than 150,000 years the earliest date when it is known that humans made stone tools

选项:

A、when it is known that humans made
B、at which it is known that humans had made
C、at which humans are known to have made
D、that humans are known to be making
E、of humans who were known to make

答案:

C
3答疑

[Critical Reasoning]

登录查看答疑

试题详情

题目：

Parland's alligator population has been declining in recent years, primarily because of hunting. Alligators prey heavily on a species of freshwater fish that is highly valued as food by Parlanders, who had hoped that the decline in the alligator population would lead to an increase in the numbers of these fish available for human consumption. Yet the population of this fish species has also declined, even though the annual number caught for human consumption has not increased.

Which of the following, if true, most helps to explain the decline in the population of the fish species?

选项:

A、The decline in the alligator population has meant that fishers can work in some parts of lakes and rivers that were formerly too dangerous.
B、Over the last few years, Parland's commercial fishing enterprises have increased the number of fishing boats they use.
C、The main predator of these fish is another species of fish on which alligators also prey.
D、Many Parlanders who hunt alligators do so because of the high market price of alligator skins, not because of the threat alligators pose to the fish population.
E、In several neighboring countries through which Parland's rivers also flow, alligators are at risk of extinction as a result of extensive hunting.

答案:

C
0评分
564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
1707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
1910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
715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
1623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
1141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
765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
781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
180749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
187863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