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题目：

On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow, as seen in the rings visible in the cross sections of their trunks.

选项:

A、On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow
B、On Earth, among the surest indications of sunspot cycles are, it is believed, the rate of tree growth
C、On Earth, the rate at which trees grow is believed to be among the surest indications of sunspot cycles
D、Among the surest indications on Earth of sunspot cycles, believed to be the tree growth rate
E、Among the surest indications on Earth of sunspot cycles is believed to be the rate at which trees grow

答案:

E
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题目：

According to recent studies comparing the nutritional value of meat from wild animals and meat from domesticated animals, wild animals have less total fat than do livestock fed on grain and more of a kind of fat they think is good for cardiac health.

选项:

A、wild animals have less total fat than do livestock fed on grain and more of a kind of fat they think is
B、wild animals have less total fat than livestock fed on grain and more of a kind of fat thought to be
C、wild animals have less total fat than that of livestock fed on grain and have more fat of a kind thought to be
D、total fat of wild animals is less than livestock fed on grain and they have more fat of a kind thought to be
E、total fat is less in wild animals than that of livestock fed on grain and more of their fat is of a kind they think is

答案:

B
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题目：

Starfish, with anywhere from five to eight arms, have a strong regenerative ability, and if one arm is lost it quickly replaces it, sometimes by the animal overcompensating and growing an extra one or two.

选项:

A、one arm is lost it quickly replaces it, sometimes by the animal overcompensating and
B、one arm is lost it is quickly replaced, with the animal sometimes overcompensating and
C、they lose one arm they quickly replace it, sometimes by the animal overcompensating,
D、they lose one arm they are quickly replaced, with the animal sometimes overcompensating,
E、they lose one arm it is quickly replaced, sometimes with the animal overcompensating,

答案:

B
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题目：

Heavy commitment by an executive to a course of action, especially if it has worked well in the past, makes it likely to miss signs of incipient trouble or misinterpret them when they do appear.

选项:

A、Heavy commitment by an executive to a course of action, especially if it has worked well in the past, makes it likely to miss signs of incipient trouble or misinterpret them when they do appear.
B、An executive who is heavily committed to a course of action, especially one that worked well in the past, makes missing signs of incipient trouble or misinterpreting ones likely when they do appear.
C、An executive who is heavily committed to a course of action is likely to miss or misinterpret signs of incipient trouble when they do appear, especially if it has worked well in the past.
D、Executives' being heavily committed to a course of action, especially if it has worked well in the past, makes them likely to miss signs of incipient trouble or misinterpreting them when they do appear.
E、Being heavily committed to a course of action, especially one that has worked well in the past, is likely to make an executive miss signs of incipient trouble or misinterpret them when they do appear.

答案:

E
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[Problem Solving]

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题目：

The charge for a single room at Hotel P  is 25 percent less than the charge for a single room at Hotel R  and 10 percent less than the charge for a single room at Hotel G . The charge for a single room at Hotel R  is what percent greater than the charge for a single room at Hotel G  ?

选项:

A、15%
B、20%
C、40%
D、50%
E、150%

答案:

B
18答疑

[Critical Reasoning]

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题目：

In the year following an eight-cent increase in the federal tax on a pack of cigarettes, sales of cigarettes fell ten percent.  In contrast, in the year prior to the tax increase, sales had fallen one percent.  The volume of cigarette sales is therefore strongly related to the after-tax price of a pack of cigarettes.
 
The argument above requires which of following assumptions?

选项:

A、During the year following the tax increase, the pretax price of a pack of cigarettes did not increase by as much as it had during the year prior to the tax increase.
B、The one percent fall in cigarette sales in the year prior to tax increase was due to a smaller tax increase.
C、The pretax price of a pack of cigarettes gradually decreased throughout the year before and the year after the tax increase.
D、For the year following the tax increase, the pretax price of a pack of cigarettes was not eight or more cents lower than it had been the previous year.
E、As the after-tax price of a pack of cigarettes rises, the pretax price also rises.

答案:

D
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题目：

For protection from the summer sun, the Mojave lived in open-sided, flat-topped dwellings known as shades, each a roof of poles and arrowweed supported by posts set in a rectangle.

选项:

A、each a roof of poles and arrowweed
B、each a roof of poles and arrowweed that are being
C、with each being a roof of poles and arrowweed
D、with roofs of poles and arrowweed to be
E、with roofs of poles and arrowweed that are

答案:

A
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题目：

Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over North America, they are named for the New Mexico site where they were first discovered in 1932.

选项:

A、Even though Clovis points, spear points with longitudinal grooves chipped onto their faces, have been found all over North America, they are named for the New Mexico site where they were first discovered in 1932.
B、Although named for the New Mexico site where first discovered in 1932, Clovis points are spear points of longitudinal grooves chipped onto their faces and have been found all over North America.
C、Named for the New Mexico site where they have been first discovered in 1932, Clovis points, spear points of longitudinal grooves chipped onto the faces, have been found all over North America.
D、Spear points with longitudinal grooves that are chipped onto the faces, Clovis points, even though named for the New Mexico site where first discovered in 1932, but were found all over North America.
E、While Clovis points are spear points whose faces have longitudinal grooves chipped into them, they have been found all over North America, and named for the New Mexico site where they have been first discovered in 1932.

答案:

A
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题目：

The remarkable similarity of Thule artifacts throughout a vast region can, in part, be explained as a very rapid movement of people from one end of North America to the other.

选项:

A、The remarkable similarity of Thule artifacts throughout a vast region can, in part, be explained as
B、Thule artifacts being remarkably similar throughout a vast region, one explanation is
C、That Thule artifacts are remarkably similar throughout a vast region is, in part, explainable as
D、One explanation for the remarkable similarity of Thule artifacts throughout a vast region is that there was
E、Throughout a vast region Thule artifacts are remarkably similar, with one explanation for this being

答案:

D
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题目：

A ruined structure found at Aqaba, Jordan, was probably a church, as indicated in its eastward orientation and by its overall plan, as well as artifacts, such as glass oil-lamp fragments, found at the site.

选项:

A、A ruined structure found at Aqaba, Jordan, was probably a church, as indicated in its eastward orientation and by its overall plan, as well as
B、A ruined structure found at Aqaba, Jordan, once probably being a church, was indicated by its eastward orientation, overall plan, and
C、Indicating that a ruined structure found at Aqaba, Jordan, was probably a church were its eastward orientation and overall plan, but also the
D、A ruined structure found at Aqaba, Jordan, was probably a church, as indicates its eastward orientation and overall plan, as well as the
E、That a ruined structure found at Aqaba, Jordan, was probably a church is indicated by its eastward orientation and overall plan, as well as by the

答案:

E
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1042浏览

[Undefined]

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Scientific evidence suggests that the benefits arising from consumption of alcohol are greatest with alcohol that is taken with meals on a moderate, regular basis than when it is consumed on binges.
请老师讲一下b和d的对比
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1922浏览

[Undefined]

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With a record number of new companies starting up in Derderia and with previously established companies adding many jobs, a record number of new jobs were created last year in the Derderian economy.  This year, previously established companies will not be adding as many new jobs overall as such companies added last year.  Therefore, unless a record number of companies start up this year, Derderia will not break its record for new jobs created.
 
Which of the following is an assumption on which the argument relies?
错选了B 请老师讲解一下为什么C好
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2030浏览

[Undefined]

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What is the volume of a given cube?

(1) The ratio of an edge of the cube and the greatest distance between two points on the cube is

(2) The length of the diagonal across a face of the cube is 2.
这道题描述太复杂，有点混乱。隐约觉得两个都不充分，所以选了E。
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1349浏览

[GWD]

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A shipment of 8 television sets contains 2 black-and-white sets and 6color sets. If 2 television sets are to be chosen at random from this shipment, what is the probability that at least 1 of the 2 sets chosen will be a black-and-white set?
我的思路： - 至少一个： 那么2个黑白球必须有一个入选， 可能个数： C21=2； - 另外一个在剩下的7个里面选就可以了： C71=7； - 总共有的可能个数： C82=28 所以，概率=（2*7）/28=1/2 求指教
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1111浏览

[GWD]

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If , is x+y=xy?
(1)    (1-x)(1-y)=1
(2)    x^2-y^2=x^2y-xy^2
条件1我证明出来了。但是条件2中“x^2y-xy^2”怎么地也应该凑的出（x-y）才可以跟前面的 x^2-y^2同时约去（x-y）吧？请老师分解下x^2y-xy^2，谢谢！
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852浏览

[Undefined]

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 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.
感觉这道题的叙述怪怪的，不知道是不是我理解错了，觉得应该选D~
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31063浏览

[GWD]

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Running at their respective constant rates, machine X takes 2 days longer to produce w widgets than machine Y. At these rates, if the two machines together produce 5/4 w widgets in 3 days, how many days would it take machine X alone to produce 2w widgets?
没能明白上一个老师讲的方程式时怎么来的，请老师解答一下。
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993浏览

[GWD]

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What was the range of the selling prices of the 30 wallets sold by a certain store yesterday?
(1)  1/3 of the wallets had a selling price of $24 each.
(2)   The lowest selling price of the wallets was 1/3 the highest selling price of the wallets.
这题我觉得1,2联立可以得到范围是8-72，为什么答案是E呢？
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[Undefined]

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Analytical!
If n is the product of the integers from 1 to 20 inclusive, what is the greatest integer k for which 2^k is a factor of n? A. 10 B. 12 C. 15 D. 18 E. 20
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[Undefined]

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S is a set of integers such that
I) If x is in S, then –x is in S.
II) If both x and y are in S, then so is x + y.
Is –2 in S?
 (1) 1 is in S.
(2) 0 is in S.
 
由statement 1可以推出来集合中有-1、0、1，不知道-2是怎么推出来的。
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