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[Sentence Correction]

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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
20答疑

[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
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[Sentence Correction]

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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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[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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4625浏览

[OG20]

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Often major economic shifts are so gradual as to be indistinguishable at first from ordinary fluctuations in the financial markets.
老师请问可以说一下so..as to和so...that 的区别和怎么区分吗？谢谢！
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6274浏览

[Undefined]

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Digging in sediments in northern China, evidence has been gathered by scientists suggesting that complex life-forms emerged much earlier than they had previously thought.
考虑到明星课上说的DE选项 “that” 无法指代复数形式的“life forms”，如果我将DE选项最后的那个that（见下图黄色笔标记）改成复数形式的“those”，那DE选项还有什么其他错误呢？还是说 该过后，D选项就可以作为正确选项了？
1评分
317273浏览

[Undefined]

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Analytical!
老师您好，我看了您明星课上给的题目答案过程，但是还是不太清楚自己的过程哪里出错了。能麻烦您解释一下吗？谢谢！ （我用紫色笔框出了我的解题过程）
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316997浏览

[Undefined]

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Analytical!
请问老师，原文题目当中【即A选项】中estimates后面的and为什么前面没有逗号呢？这样没有逗号不就是跟从句后面surpassed并列了吗？可本应该是跟主句谓语并列呀？
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317001浏览

[Undefined]

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Analytical!
请问一下老师此题中的选项B中的’ which were’的which不应该是要遵照定语从句中就近原则，来指代Richard Nixon吗？【我清楚人应该用whom来指代】可是为什么这里没有遵照就近原则呢？
1评分
1319浏览

[Undefined]

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According to the passage, each of the following is a difference between women’s oral narratives and most standard histories EXCEPT:
请问老师，C选项的well-know women我觉得是包含在第一段最后一句“women‘s contribution”里的；然后E我觉得并不是women的oral history对collective identity有多大作用，而是present-day women with historical continuity对collective identity有作用呀。谢谢老师～
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[Undefined]

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Analytical!
老师您好，我听了您的基础课解释的为什么分子只能有一个C[1,60]，但是还是不太理解。在第一个班（e.g. senior）sibling里选一个是C[1,60]，另一个班就是C[1,1] 而不是C[1,60]呢？ 我不懂的点在于 题目说是两次选取都是random的，也就是在图中大写A里选出姐姐，不代表一定会在小写a 里选中她对应的妹妹呀？ 这里我比较糊，能麻烦老师您解释一下吗？谢谢！
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316284浏览

[Undefined]

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Analytical!
老师，数学基础课这题 在可重复使用letter时，为什么在two letter code时不用✖️A[2,2]，在three letter code时 不用✖️A[3,3]呢？ 我是知道 当需要“选，拿，取”时，我们要用C，；但是我对具体什么时候需要用到A 还是有些模糊。能不能麻烦老师您解释一下我们什么时候会用到A？特别是在我们已经用到C后，什么时候需要在C基础上 再✖️A（e.g. C[3,26]✖️A[3,3]）？ 谢谢！
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1508浏览

[OG]

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It can be inferred that both Burckhardt and Kelly have been criticized by the scholars mentioned in line 12 for which of the following?
为什么不选A而是B 感觉这两个选项很相似
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317618浏览

[Undefined]

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Analytical!
老师，能麻烦您解释一下您在数学基础课上说的 “因为k+7 可以整除3，所以整个式子可整除3” 的原因是什么吗？这里为什么可以直接判断出 k（k+7）可以被2整除呢？谢谢！
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