【OG12-(5&6)】GMAT-RC专项资料精炼提升（3）

泾渭不凡

汇总链接（要求详细说明）：
http://forum.chasedream.com/GMAT_RC/thread-668154-1-1.html
【OG12-(3&4)】GMAT-RC专项资料精炼提升（2）链接：
http://forum.chasedream.com/GMAT_RC/thread-668951-1-1.html
【OG12-(7&8)】GMAT-RC专项资料精炼提升（4）链接：
http://forum.chasedream.com/GMAT_RC/thread-670815-1-1.html


OG12-5

In terrestrial environments, gravity places
special demands on the cardiovascular systems of
animals. Gravitational pressure can cause blood to
pool in the lower regions of the body, making it
(5)difficult to circulate blood to critical organs such as
the brain. Terrestrial snakes, in particular, exhibit
adaptations that aid in circulating blood against the
force of gravity.
        The problem confronting terrestrial snakes is best
(10) illustrated by what happens to sea snakes when
removed from their supportive medium. Because the
vertical pressure gradients within the blood vessels
are counteracted by similar pressure gradients in the
surrounding water, the distribution of blood
(15) throughout the body of sea snakes remains about
the same regardless of their orientation in space,
provided they remain in the ocean. When removed
from the water and tilted at various angles with the
head up, however, blood pressure at their midpoint
(20) drops significantly, and at brain level falls to zero.
That many terrestrial snakes in similar spatial
orientations do not experience this kind of circulatory
failure suggests that certain adaptations enable them
to regulate blood pressure more effectively in those
(25) orientations.
   One such adaptation is the closer proximity of the
terrestrial snake's heart to its head, which helps to
ensure circulation to the brain, regardless of the
snake's orientation in space. The heart of sea snakes
(30) can be located near the middle of the body, a
position that minimizes the work entailed in
circulating blood to both extremities. In arboreal
snakes, however, which dwell in trees and often
assume a vertical posture, the average distance
(35) from the heart to the head can be as little as 15
percent of overall body length. Such a location
requires that blood circulated to the tail of the
snake travel a greater distance back to the heart,
a problem solved by another adaptation. When
(40) climbing, arboreal snakes often pause
momentarily to wiggle their bodies, causing waves
of muscle contraction that advance from the lower
torso to the head. By compressing the veins and
forcing blood forward, these contractions
(45) apparently improve the flow of venous blood
returning to the heart.

泾渭不凡

Questions 18-25 refer to the passage on page 366.
18.The passage provides information in support of which
of the following assertions?
(A)The disadvantages of an adaptation to a
particular feature of an environment often
outweigh the advantages of such an adaptation.
(B)An organism's reaction to being placed in an
environment to which it is not well adapted can
sometimes illustrate the problems that have
been solved by the adaptations of organisms
indigenous to that environment.
(C)The effectiveness of an organism's adaptation to
a particular feature of its environment can only
be evaluated by examining the effectiveness
with which organisms of other species have
adapted to a similar feature of a different
environment.
(D)Organisms of the same species that inhabit
strikingly different environments will often adapt
in remarkably similar ways to the few features of
those environments that are common.
(E)Different species of organisms living in the same
environment will seldom adapt to features of
that environment in the same way.
Application
This question requires recognizing a principle
underlying the passage's overall discussion. The
passage makes a general claim about terrestrial
animals' need to overcome the effect of gravity on
their blood circulation systems, and it then uses
the specific example of terrestrial snakes to
illustrate this claim. To help identify the
adaptations used by terrestrial snakes, the passage
describes what happens to sea snakes, which arc
aquatic and less affected by gravity's influence,
when they are subjected to a terrestrial
environment. The specific problems faced by these
snakes strongly suggest that terrestrial snakes
have developed ways to overcome these problems.
The passage then identifies specific physiological
differences between sea snakes and terrestrial
snakes that demonstrate how terrestrial snakes
overcome gravity's influence.
AThe passage discusses how species have
successfully adapted to their specific
environments and does not mention that
these adaptations create disadvantages in
that environment.
BCorrect. The passage discusses the problems
faced by sea snakes when they are subjected
to a terrestrial environment and then
examines terrestrial snakes to illustrate how
certain adaptations solved these problems.
CThe passage is not concerned with
evaluating the effectiveness of species'
adaptations to their environments; it takes
for granted that these adaptations are
effective.
DThe passage is concerned with how species
adapt differently to different environments
and not with how adaptations to different
environments are similar.
EThe passage discusses how different
environments affect how species have
adapted, not how different species adapt to a
similar environment.
The correct answer is B.

19.According to the passage, one reason that the
distribution of blood in the sea snake changes little
while the creature remains in the ocean is that
(A)the heart of the sea snake tends to be located
near the center of its body
(B)pressure gradients in the water surrounding the
sea snake counter the effects of vertical
pressure gradients within its blood vessels
(C)the sea snake assumes a vertical posture less
frequently than do the terrestrial and the
arboreal snake
(D)the sea snake often relies on waves of muscle
contractions to help move blood from the torso
to the head
(E)the force of pressure gradients in the water
surrounding the sea snake exceeds that of
vertical pressure gradients within its circulatory
system
This question asks for an identification of factual
information in the passage. Given that the
contrast between sea snakes and terrestrial snakes
is being used to identify adaptations used by
terrestrial animals to overcome the effect of
gravity on their circulation systems, the passage
needs initially to illustrate why it is that sea
snakes are not confronted with the same problems
that gravity causes for terrestrial snakes. This
information therefore needs to come fairly early in
the passage.
AThe passage identifies the location of a sea
snake's heart as a factor that minimizes the
effort required to pump blood to both
extremities but not as a cause of the even
distribution of blood in sea snakes.
BCorrect. The passage states explicitly in
lines 11-17 that while sea snakes are in the
ocean, the vertical pressure gradients in
their blood vessels are counteracted by the
pressure gradients in the water.
CThe passage does not discuss the frequency
with which any snakes assume certain
postures.
DThe passage discusses muscle contractions
only in relation to arboreal snakes.
EThe passage states that the vertical pressures
within sea snakes' blood vessels are
counteracted (line 13) by the water's pressure,
which suggests that the pressures are
equalized, not that one force exceeds the
other.
The correct answer is B.

20. It can be inferred from the passage that which of the
following is true of species of terrestrial snakes that
often need to assume a vertical posture?
(A)They are more likely to be susceptible to
circulatory failure in vertical postures than are
sea snakes.
(B)Their hearts are less likely to be located at the
midpoint of their bodies than is the case with
sea snakes.
(C)They cannot counteract the pooling of blood in
lower regions of their bodies as effectively as
sea snakes can.
(A)The blood pressure at their midpoint decreases
significantly when they are tilted with their
heads up.
(B)They are unable to rely on muscle contractions
to move venous blood from the lower torso to
the head.
Inference
This question requires using information given
about how arboreal snakes, which are frequently
in vertical postures, have adapted to gravity's
influence to make an assumption that other
terrestrial snakes that are frequently in these
postures are likely to have similar adaptations.
The passage implies that sea snakes have hearts at
the midpoint of their bodies because the water's
pressure gradients help distribute blood evenly. It
then illustrates that arboreal snakes have hearts
closer to their heads to help keep blood flowing to
their brain when they are in vertical postures.
AThe passage does not suggest that any of the
snakes mentioned are ill-adapted to their
particular environments.
BCorrect. The passage states that arboreal
snakes have hearts close to their heads and
not at the midpoints of their bodies, so it is
reasonable to conclude that any terrestrial
snake that frequently assumes vertical
postures would be unlikely to have hearts at
their bodies' midpoint.
CAs with option (A), the passage does not
suggest that any species of snake is ill-
adapted to its environment.
DThe passage states that sea snakes lose
pressure at their midpoints when they are
tilted on land with heads up but that
terrestrial snakes do not have this problem.
EBecause arboreal snakes use muscle
contractions to circulate blood when they
are vertical, it is likely that most terrestrial
snakes that frequently assume vertical
postures also have this capability.
The correct answer is B.

21.The author describes the behavior of the circulatory
system of sea snakes when they are removed from
the ocean (see lines 17-20) primarily in order to
(A)illustrate what would occur in the circulatory
system of terrestrial snakes without adaptations
that enable them to regulate their blood
pressure in vertical orientations
(B)explain why arboreal snakes in vertical
orientations must rely on muscle contractions to
restore blood pressure to the brain
(C)illustrate the effects of circulatory failure on the
behavior of arboreal snakes
(D)illustrate the superiority of the circulatory
system of the terrestrial snake to that of the sea
snake
(E)explain how changes in spatial orientation can
adversely affect the circulatory system of
snakes with hearts located in relatively close
proximity to their heads
Evaluation
Answering this question requires understanding
why sea snakes have been brought into the
passage's overall discussion about how terrestrial
animals have overcome the influence of gravity on
their blood circulation. The passage uses the
effects that gravity has on sea snakes when they
are taken out of water to identify problems that
terrestrial snakes must have adapted to in order to
survive.
ACorrect. The passage uses the problems sea
snakes have when taken out of water to
illustrate that without certain adaptations,
terrestrial snakes would likely have similar
problems.
BThe passage discusses sea snakes to illustrate
problems faced by terrestrial snakes, not to
explain how terrestrial snakes have adapted
to gravity's influence.
CThe passage does not discuss the effects of
circulatory failure on arboreal snakes.
DThe passage does not compare or contrast
the effectiveness of the various adaptations
used by different snakes.
EThe passage does not imply that snakes with
hearts close to their heads are adversely
affected by spatial positions.

22.It can be inferred from the passage that which of the
following is a true statement about sea snakes?
(A)They frequently rely on waves of muscle
contractions from the lower torso to the head to
supplement the work of the heart.
(B)They cannot effectively regulate their blood
pressure when placed in seawater and tilted at
an angle with the head pointed downward.
(C)They are more likely to have a heart located in
close proximity to their heads than are arboreal
snakes.
(D)They become acutely vulnerable to the effects
of gravitational pressure on their circulatory
system when they are placed in a terrestrial
environment.
(E)Their cardiovascular system is not as
complicated as that of arboreal snakes.
Inference
Answering this question requires understanding
why sea snakes are discussed in the passage and
what happens to them when they are taken out of
water and subjected to the force of gravity. The
second paragraph implies strongly that sea snakes
will not survive certain terrestrial situations for
which they are not adapted.
AThe passage associates muscle contractions
to circulate blood with arboreal snakes only.
BAccording to the passage, sea snakes'
inability to regulate blood pressure occurs
only when they are taken out of water.
CThe passage states clearly that arboreal
snakes have hearts closer to their heads than
do sea snakes.
DCorrect. The passage states that in certain
postures, sea snakes placed in a terrestrial
environment will lose all blood pressure at
their brains, which is an acute vulnerability.
EThe passage does not provide the
information needed to compare the
complexity of the various snakes discussed.
The correct answer is D.

23、The author suggests that which of the following is a
disadvantage that results from the location of a
snake's heart in close proximity to its head?
(A)A decrease in the efficiency with which the snake
regulates the flow of blood to the brain
(B)A.decrease in the number of orientations in
space that a snake can assume without loss of
blood flow to the brain
(C)A decrease in blood pressure at the snake's
midpoint when it is tilted at various angles with
its head up
(D)An increase in the tendency of blood to pool at
the snake's head when the snake is tilted at
various angles with its head down
(E)An increase in the amount of effort required to
distribute blood to and from the snake's tail
Inference
This question asks for an inference about the
location of a snake's heart being closer to the
brain than to the midpoint of its body. In the
third paragraph, the passage states that in
terrestrial snakes, which must fight the influence
of gravity, the closer proximity of the heart to the
head ensures blood circulation to the brain. The
passage notes, however, that this makes it more
difficult for such snakes to maintain blood
circulation to the tail.
AThe passage states that snakes have brains
closer to their heads to more efficiently
circulate blood to the brain.
BThe passage suggests that having the heart
close to the head increases the spatial
orientations a snake can assume without
losing blood flow to the brain, rather than
decreases the number of orientations.
C The passage indicates that this is true only
of sea snakes with hearts near their body's
midpoint.
DThe passage mentions blood pooling in the
lower portions of a terrestrial organism's
body but does not imply that blood can pool
at a snake's head.
ECorrect. Because, as the passage states, it is
more difficult for a snake with its heart close
to its head to circulate blood to the tail, and
therefore its body is likely to put more effort
into circulating blood to the tail.

24.The primary purpose of the third paragraph is to
(A)introduce a topic that is not discussed earlier in
the passage
(B)describe a more efficient method of achieving
an effect discussed in the previous paragraph
(C)draw a conclusion based on information
elaborated in the previous paragraph
(D)discuss two specific examples of phenomena
mentioned at the end of the previous paragraph
(E)introduce evidence that undermines a view
reported earlier in the passage
Evaluation
Answering this question requires recognizing
how the passage develops its main point. The first
paragraph sets up a general claim about gravity's
influence on terrestrial organisms. The second
paragraph then describes the ill effects that
gravity has on sea snakes to identify problems that
terrestrial snakes have had to adapt to. The third
paragraph then uses examples to illustrate how
terrestrial snakes have adapted to gravity's
influence.
AThe topic of the third paragraph is the
adaptations developed by terrestrial snakes
to survive gravity's influence, which is part
of the discussion in both the first and second
paragraphs.
BThere is no comparison in the passage of the
efficiency of the different methods used by
snakes to adapt to gravity's influence.
CThe third paragraph is concerned with
illustrating certain adaptations used by
snakes and offers no conclusions about the
problems terrestrial snakes have had to
adapt to, which is the topic of the second
paragraph.
DCorrect. The end of the second paragraph
refers to certain adaptations (line 23) that the
third paragraph then goes on to identify and
discuss.
EThe third paragraph supports the main idea
of the passage and is not used to counter any
claim made earlier.
The correct answer is D.

25.In the passage, the author is primarily concerned with
doing which of the following?
(A)Explaining adaptations that enable the terrestrial
snake to cope with the effects of gravitational
pressure on its circulatory system
. (B)Comparing the circulatory system of the sea
snake with that of the terrestrial snake
(C)Explaining why the circulatory system of the
terrestrial snake is different from that of the sea
snake
(D)Pointing out features of the terrestrial snake's
cardiovascular system that make it superior to
that of the sea snake
(E)Explaining how the sea snake is able to
neutralize the effects of gravitational pressure
on its circulatory system
Main idea
Answering this question involves assessing what
the passage as a whole is attempting to do. While
the passage begins by making a general claim
about gravity's influence on the cardiovascular
systems of terrestrial animals, it immediately points
to terrestrial snakes as a good example supporting
this claim. The rest of the passage is then devoted
to illustrating, using the observations involving sea
snakes, how gravity's influence has shaped the
cardiovascular systems of terrestrial snakes.
ACorrect. The entire passage is devoted to an
explanation of how terrestrial snakes have
adapted to gravity's influence.
BWhile the passage does compare the
systems of the two snakes, it does so for the
larger purpose of demonstrating gravity's
influence on terrestrial snakes.
CThe passage is more concerned with how the
systems of the two snakes are different,
rather than why, in order to identify how
terrestrial snakes have adapted to gravity's
influence.
D There is no judgment in the passage as to
the superiority of one snake's system over
the other.
EWhile the passage does explain how sea
snakes do this, it does so only for the larger
purpose of identifying how terrestrial snakes
have adapted to gravity's influence.

泾渭不凡

OG12-6

During the 1960s and 1970s, the primary
economic development strategy of local
governments in the United States was to attract
manufacturing industries. Unfortunately, this
(5)strategy was usually implemented at another
community's expense: many manufacturing facilities
were lured away from their moorings elsewhere
through tax incentives and slick promotional efforts.
Through the transfer of jobs and related revenues
(10) that resulted from this practice, one town's triumph
could become another town's tragedy.
        In the 1980s the strategy shifted from this
zero-sum game to one called "high-technology
development," in which local governments
(15) competed to attract newly formed high-technology
manufacturing firms. Although this approach was
preferable to victimizing other geographical areas
by taking their jobs, it also had its shortcomings:
high-tech manufacturing firms employ only a
(20) specially trained fraction of the manufacturing
workforce, and there simply are not enough
high-tech firms to satisfy all geographic areas.
         Recently, local governments have increasingly
come to recognize the advantages of yet a third
(25) strategy: the promotion of homegrown small
businesses. Small indigenous businesses are
created by a nearly ubiquitous resource, local
entrepreneurs. With roots in their communities,
these individuals are less likely to be enticed away
(30) by incentives offered by another community.
Indigenous industry and talent are kept at home,
creating an environment that both provides jobs
and fosters further entrepreneurship.

泾渭不凡

26.The primary purpose of the passage is to
(A)advocate more effective strategies for
encouraging the development of high-
technology enterprises in the United States
(B)contrast the incentives for economic
development offered by local governments with
those offered by the private sector
(C)acknowledge and counter adverse criticism of
programs being used to stimulate local
economic development
(D)define and explore promotional efforts used by
local governments to attract new industry
(E)review and evaluate strategies and programs
that have been used to stimulate economic
development
Main idea
To find the primary purpose, analyze the passage
in its entirety. The passage discusses three different
strategies or programs that local governments use
to stimulate economic development, so the
statement of the primary purpose must embrace all
three strategies rather than focus on just one. The
first paragraph describes how local governments
attracted manufacturing industries in the 1960s
and 1970s, with the result that one town prospered
at another's expense. The second paragraph turns
to the growth of high-technology manufacturing
firms in the 1980s, which required a specialized
workforce. The final paragraph shows the
advantages of promoting local entrepreneurship.
AHigh-technology development is only one of
three kinds of economic development the
passage discusses.
BThe private sector is not mentioned in the
passage.
CThe passage acknowledges problems but
does not counter criticism.
DThe passage examines the efforts to attract
new industry in the first two paragraphs, but
not in the third.
ECorrect. The passage describes and
evaluates strategies and programs used by
local governments to stimulate economic
growth in their areas.
The correct answer is E.

27、The passage suggests which of the following about
the majority of United States manufacturing industries
before the high-technology development era of the
1980s?
(A)They lost many of their most innovative
personnel to small entrepreneurial enterprises.
(B)They experienced a major decline in profits
during the 1960s and 1970s.
(0They could provide real economic benefits to the
areas in which they were located.
(D)They employed workers who had no specialized
skills.
(E)They actively interfered with local
entrepreneurial ventures.
Inference
This question directs attention to the
manufacturing industries discussed in the first
paragraph and asks for an inference about these
industries. Because of the transfer of jobs and related
revenues, attracting a manufacturer to a town was
a triumph; losing such an industry was a tragedy
(lines 9-11). In order for this conclusion to be
true, it is logical to infer that these industries
must have had a significant economic impact on
the towns in which they were located.
ANo information in the passage supports such
a loss of personnel.
BThe passage does not describe the industries'
loss of profits.
CCorrect. Transfer of jobs and related
revenues to a community clearly provide real
economic benefits to that community.
DThe second paragraph mentions the specially
trainedfraction of the manufacturing workforce
(lines 20-21) suitable for high-tech jobs, but
that does not imply that workers in
manufacturing industries were unskilled.
EThe passage makes no suggestion that there
was such interference.
The correct answer is C.

28.The tone of the passage suggests that the author is
most optimistic about the economic development
potential of which of the following groups?
(A)Local governments
(B)High-technology promoters
(C)Local entrepreneurs
(D)Manufacturing industry managers
(E)Economic development strategists
Tone
To answer this question about the author's
attitude, look at what the author says when
evaluating the ways local governments try to
stimulate economic growth. In the first two
paragraphs, the author points out serious
disadvantages in attracting manufacturing (lines
4-11) and high-technology industries (lines
19-22). The final paragraph, however, offers only
advantages to promoting local entrepreneurship.
The author does not mention any disadvantages
here, which implies that the author is most
optimistic about this third strategy, which both
provides jobs andfosters further entrepreneurship.
AThe local governments are part of the
discussion of all three strategies, not just the
one about which the author is most
optimistic.
BIn lines 18—22, the author points out the
shortcomings of high-technology
development.
CCorrect. The author has only good things to
say about local entrepreneurs.
DThe author does not discuss managers of
manufacturing industries.
EOther than local governments, the author
does not mention economic development
strategists.
The correct answer is C.

29.The passage does NOT state which of the following
about local entrepreneurs?
(A)They are found nearly everywhere.
(B)They encourage further entrepreneurship.
(C)They attract out-of-town investors.
(D)They employ local workers.
(E)They are established in their communities.
Supporting ideas
Use the process of elimination to discover the
only characteristic of local entrepreneurs that is
NOT explicitly stated in the passage. To do this,
check each answer choice against the description
of local entrepreneurs found in lines 28-33 of the
passage.
ALine 27 does identify them as a nearly
ubiquitous resource, meaning that they are
found in most places.
BLine 33 says they create an environment
that fostersfurther entrepreneurship.
CCorrect. Out-of-town investors are not
mentioned in the passage.
DLines 31-32 say that industry and talent are
kept at home and that they create an
environment that provides jobs.
ELine 28 describes them as having roots in
their communities.
The correct answer is C.

30.The author of the passage mentions which of the
following as an advantage of high-technology
development?
(A)It encourages the modernization of existing
manufacturing facilities.
(B)It promotes healthy competition between rival
industries.
(C)It encourages the growth of related industries.
(D)It takes full advantage of the existing workforce.
(E)It does not advantage one local workforce at the
expense of another.
Supporting ideas
To answer this question, look for an advantage of
high-technology development that is explicitly
mentioned in the passage. In the second
paragraph, the efforts of local governments to
attract new high-technology firms are judged
preferable to previous efforts to entice established
manufacturing industries from another town to
their own. Thus, the introduction of high
technology made it possible for local governments
to stop victimizing other geographical areas by taking
their jobs (lines 17-18).
A The passage does not describe
modernization of facilities.
BCompetition between rival industries is not
mentioned in the passage.
CThe growth of related industries is not cited
as an advantage.
DLines 19-21 explain that high-tech
manufacturing firms employ only a fraction
of the workforce.
ECorrect. The introduction of a new high-
technology firm creates jobs for the local
community without causing jobs to be lost
elsewhere.
The correct answer is E.

三水莲台

先给饭饭姐水一楼，顶一下！嘎嘎嘎

Suri在奋斗

再站位，昨天占了木有来，没脸了加油·~！！！

泾渭不凡

OG12-5

一、回忆
      陆地环境，地心引力对土蛇心血管系统有特殊要求：血液集中于身体lower regions, 导致脑部等区域可能供血不足。
      土蛇适应环境，关键词：adaptions。
      水蛇对比，水蛇的心血管系统特点在水中可以很好的运作，即使身体朝向不同方向。但是，水蛇移出水中环境，移到陆地环境，心血管运作不良。此处和土蛇对比，说明adaptations对土蛇的作用。
      列举土蛇一个adaptation：土蛇的心脏分布靠近头部。对比水蛇，心脏位于中间。
      对比：树蛇心脏位于身体靠近头部15%的位置-导致对尾部供血有特殊要求。。。需要wiggle以保证神马的。。树蛇这有点小纠结。。

二、文章类型及结构
      （一）文章类型：问题解决型
                判断标志：problem，difficulty（本文变形：making it difficult to do）。
      （二）文章结构：
                1、问题提出：土蛇位于陆地环境，地心引力对心血管系统
特殊要求（或不良影响）。
                2、问题解决：土蛇的adaptations 。此时阐述土蛇的适应变化。列举水蛇和树蛇进行对比，说明adaptations。    

三、prephase-出题点
     （一）in order to题型：问水蛇和树蛇的阐述目的是什么呢；或是某细节的阐述的目的，一般答案都是前一句或是后一句的逻辑上一次面文中含义。
     （二）对比模式：对象对比：不同蛇蛇。细节取非可能出题。
     （三）可能出结构题型：记住问题解决型文章套路。
     （四）细节题：觉得树蛇部分会比较愿意出细节题。
     （五）逻辑续写：问文章之后若作者要继续写会些什么。

泾渭不凡

OG12-6

一、回忆：
     （时间总是记不清，记住位置，考题的时候回来定位）
      地区政府经济发展战略一：吸引制造业。
      缺点：零和博弈，资源竞争，本地区经济发展以牺牲其他地区经济利益为大家-->易被“诱惑”到其他地区。

       战略二：“高科技发展战略”。
       优点：没有战略一的缺点。
       缺点：人力资源需求只是那些有经过培训的特定人员，不能满足当地就业需求。

       战略三：“本土小型企业”
       此类型企业资源需求可以被很到的提供。
       优点：不易迁徙的有点，满足就业，促进企业家精神等。。。

二、文章类型及结构
     （一）文章类型：新老观点对比型（这里是新老三个个政策进化对比）。
              判断标志：时间点对比。recently。
     （二）文章结构：1、政策一：时间、内容、优缺点。
                               2、政策二：同上。
                               3、政策三（重点注意）：同上，注意有点。

三、prephase-出题点
     （一）对比题：时间对比；内容对比；优缺点对比。
     （二）前提假设取反。
     （三）政策三的有点列举（可能出except题型）。
     （四）作者态度：注意找有感情色彩的adj. or adv.~

泾渭不凡

先给饭饭姐水一楼，顶一下！嘎嘎嘎-- by 会员 三水莲台 (2012/2/26 11:22:16)

小新有时间加入偶们哇~~~最近常被叫姐姐~~~哦哈啊哈哈~~~饭饭成熟了~~哦哈哈哈哈~~~

泾渭不凡

再站位，昨天占了木有来，没脸了加油·~！！！-- by 会员 Suri在奋斗 (2012/2/26 11:49:50)

~~~~大家进度不一样么~~~什么时候复习进度需要了再来做就好哇~~~Suri╭(╯3╰)╮~~~