问答

1答疑

[Table Analysis]

试题详情

题目:

The Consumer Price Index (CPI) measures the average prices of goods and services purchased by consumers. In the United States, the CPI-U calculates the CPI for all urban consumers.
The CPI-U is calculated based on prices of food, clothing, shelter, fuels, transportation fares, charges for doctors' and dentists' services, drugs, and other goods and services that people buy for day-to-day living. All taxes directly associated with the purchase and use of items (such as, in the United States, sales taxes) are included in the index. An increase in CPI-U by a certain fractional amount means an increase by that fractional amount in overall prices within the relevant category.
For analyzing general price trends in the economy, seasonally adjusted prices are usually preferred over unadjusted prices because adjusting eliminates the effect of changes that normally occur at the same time and in about the same magnitude every year—such as price movements resulting from climatic conditions, production cycles, model changeovers, and holidays.

For each of the following, select Yes if thestatement is inferable from the giveninformation. Otherwise select No.

选项:

A、The changes in seasonally adjustedprices for used cars and trucksbetween March 2010 andSeptember 2010 were in mostcases less in magnitude than thechanges in seasonally adjustedprices of new vehicles for the sameperiod.
B、The seasonally adjusted CPI-U forall items was higher in March 2010than in the previous month.
C、The seasonally unadjusted changein the price of new vehicles inAugust 2010 over the previousmonth was about the same as theseasonally unadjusted change inthe price of food away from homeover the same period.

答案:

B A B
1答疑

[Data Sufficiency]

试题详情

题目:

In the figure shown, the circle has center O and radius 50, and point P has coordinates (50,0).  If point Q (not shown) is on the circle, what is the length of line segment PQ ?
(1)   The x-coordinate of point Q is – 30.
(2)   The y-coordinate of point Q is – 40.


选项:

答案:

A
1答疑

[Problem Solving]

试题详情

题目:

 A group of 50 people, all of who voted in the last Presidential election, were polled. How many men voted for the Democratic candidate?
(1) Fifty percent of the men in the group voted for the Democratic candidate.
(2) Twenty-five people in the group voted for the Democratic candidate.

选项:

A、Aif statement (1) ALONE is sufficient to answer the question but statement (2) alone is not sufficient;
B、Bif statement (2) ALONE is sufficient to answer the question but statement (1) alone is not sufficient;
C、Cif the two statements TAKEN TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient;
D、Dif EACH statement ALONE is sufficient to answer the question;
E、Eif the two statements TAKEN TOGETHER are still NOT sufficient to answer the question.    

答案:

E
1答疑

[Sentence Correction]

试题详情

题目:

Genetic engineering sometimes entails plant or animal genes' getting spliced into other species' DNA, either to improve crop yields or for warding off insects or disease.

选项:

A、plant or animal genes' getting spliced into other species' DNA, either to improve crop yields or for warding off
B、plant or animal genes that get spliced into the DNA of other species, either for improving crop yields or the warding off of
C、the splicing of plant or animal genes into other species' DNA, to either improve crop yields or to ward off
D、splicing plant or animal genes into the DNA of other species, either to improve crop yields or to ward off
E、splicing of plant or animal genes into the DNA of other species, for either the improvement of crop yields or to ward off

答案:

D
1答疑

[Critical Reasoning]

试题详情

题目:

The difficulty with the proposed high-speed train line is that a used plane can be bought for one-third the price of the train line, and the plane, which is just as fast, can fly anywhere. The train would be a fixed linear system, and we live in a world that is spreading out in all directions and in which consumers choose the free-wheel systems (cars, buses, aircraft), which do not have fixed routes. Thus a sufficient market for the train will not exist.

Which of the following, if true, most severely weakens the argument presented above?

选项:

A、Cars, buses, and planes require the efforts of drivers and pilots to guide them, whereas the train will be guided mechanically.
B、Cars and buses are not nearly as fast as the high-speed train will be.
C、Planes are not a free-wheel system because they can fly only between airports, which are less convenient for consumers than the high-speed train's stations would be.
D、The high-speed train line cannot use currently underutilized train stations in large cities.
E、For long trips, most people prefer to fly rather than to take ground-level transportation.

答案:

C
1答疑

[Problem Solving]

试题详情

题目:

The temperature of a certain cup of coffee 10 minutes after it was poured was 120 degrees Fahrenheit. If the temperature F of the coffee f minutes after it was poured can be determined by the formula F = 120(2-at) + 60, where F is in degrees Fahrenheit and a is a constant, then the temperature of the coffee 30 minutes after it was poured was how many degrees Fahrenheit?

选项:

A、65 
B、75 
C、80 
D、85 
E、90

答案:

B
1答疑

[Problem Solving]

试题详情

题目:

In x hours and y minutes a car traveled z miles. What is the car’s speed in miles per hour? 

选项:

A、z60+y
B、60z60+y
C、6060+y
D、zx+y
E、60+y60z

答案:

B
1答疑

[Data Sufficiency]

试题详情

题目:

If x , y , and z  are positive integers, is xz  even?
(1)   xy  is even.
(2)   yz  is even.

选项:

答案:

E
1答疑

[Sentence Correction]

试题详情

题目:

Retail sales rose 0.8 of 1 percent in August, intensifying expectations that personal spending in the July–September quarter more than doubled that of the 1.4 percent growth rate in personal spending for the previous quarter.

选项:

A、that personal spending in the July–September quarter more than doubled that of
B、that personal spending in the July–September quarter would more than double
C、of personal spending in the July–September quarter, that it more than doubled
D、of personal spending in the July–September quarter more than doubling that of
E、of personal spending in the July–September quarter, that it would more than double that of

答案:

B
1答疑

[Sentence Correction]

试题详情

题目:

Unlike the original National Museum of Science and Technology in Italy, where the models are encased in glass or operated only by staff members, the Virtual Leonardo Project, an online version of the museum, encourages visitors to "touch" each exhibit, which thereby activates the animated functions of the piece.

选项:

A、exhibit, which thereby activatesexhibit, in turn an activation of
B、exhibit, and it will activate
C、exhibit and thereby activate
D、exhibit which, as a result, activates

答案:

D
0评分
329浏览

[Undefined]

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
1285浏览

[Undefined]

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
1461浏览

[Undefined]

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
564浏览

[Undefined]

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
1316浏览

[GWD]

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
938浏览

[OG]

The primary purpose of the passage is to
为什么选E不选B
0评分
631浏览

[Undefined]

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
636浏览

[Undefined]

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
150175浏览

[Undefined]

Analytical!
请问may老师,这题该用什么思路来做?
0评分
157283浏览

[Undefined]

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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