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标题: 求教OG Verbal SC 92 [打印本页]

作者: Leonyc 时间: 2012-4-15 04:01
标题: 求教OG Verbal SC 92
OG Verbal SC 92

Schistosomiasis, a disease caused by a parasitic worm, is prevalent in hot, humid climates, and it has become more widespread as irrigation projects have enlarged the habitat of ( the freshwater snails that are the parasite's hosts for part of its life cycle. )

(A) the freshwater snails that are the parasite's hosts for part of its life cycle
(B) the freshwater snails that are the parasite's hosts in part of their life cycle
(C) freshwater snails which become the parasite's hosts for part of its life cycles
(D) freshwater snails which become the hosts of the parasite during the parasite's life cycle
(E) parasite's hosts, freshwater snails which become their hostsduring their life cycles

答案是A。我当时选了B，后来一看their 和 life cycle 单复数不一致，貌似是这题的突破口。
这是OG对B错误选项的解释：The preposition IN is inappropriate for expressing duration; the plural possessive pronoun THEIR does not agree with the singular antecedent PARASITE. 我看了OG的解释以后问题又来了。
1. B里面的 in part of their life cycle 如果是修饰snails的话， in的用法应该没问题吧。从语义上好像也没有明确的指引这个pronoun到底是指代parasite 还是 snails.
2. 从A选项可以得出，A is B's host for B's life用for. 如果想表达duration in A's life, 应该用A is B's host for A's life 还是 A is B's host in A's life ？
3. A选项里面的parasite's hosts for part of its life cycle貌似和manhattan GMAT SC里的概念不一致。在MG里面pronoun的部分讲过pronoun的指代不优先possessive的形式，从这点看A反而不如B好。。到底在GMAC的标准里有没有这个preference?

求大牛请现身解惑！

作者: Livia1230 时间: 2012-4-15 04:56
我认为哈，its life cycle 中的its 是指代the parasite
要从句意上理解，主谓一致

作者: cadylql 时间: 2012-4-15 05:13
cope from manhattan (Ron):

* "Schistosomiasis" and "it" are both SUBJECTS --> they are parallel --> we'll tolerate the ambiguity.
* "parasite's" and "its" are both POSSESSIVES --> they are parallel --> we'll tolerate the ambiguity.

REMEMBER -- PRONOUN AMBIGUITY IS NOT AN ABSOLUTE RULE.
NOT ALL AMBIGUOUS PRONOUNS ARE INCORRECT.

作者: 泾渭不凡 时间: 2012-4-15 05:16

cope from manhattan (Ron):

* "Schistosomiasis" and "it" are both SUBJECTS --> they are parallel --> we'll tolerate the ambiguity.
* "parasite's" and "its" are both POSSESSIVES --> they are parallel --> we'll tolerate the ambiguity.

REMEMBER -- PRONOUN AMBIGUITY IS NOT AN ABSOLUTE RULE.
NOT ALL AMBIGUOUS PRONOUNS ARE INCORRECT.

-- by 会员 cadylql (2012/4/15 5:13:04)

+1
pronoun ambiguity is not an absolute rule
the gmat will tolerate pronoun ambiguity when both of the following are satisfied:
1. the intended referent makes much more sense than do the other possible referents,
and
2. the intended referent is PARALLEL TO THE PRONOUN, and the other possible referents are NOT parallel to the pronoun.

作者: 泾渭不凡 时间: 2012-4-15 05:18

OG Verbal SC 92

Schistosomiasis, a disease caused by a parasitic worm, is prevalent in hot, humid climates, and it has become more widespread as irrigation projects have enlarged the habitat of ( the freshwater snails that are the parasite's hosts for part of its life cycle. )

(A) the freshwater snails that are the parasite's hosts for part of its life cycle
(B) the freshwater snails that are the parasite's hosts in part of their life cycle
(C) freshwater snails which become the parasite's hosts for part of its life cycles
(D) freshwater snails which become the hosts of the parasite during the parasite's life cycle
(E) parasite's hosts, freshwater snails which become their hostsduring their life cycles

答案是A。我当时选了B，后来一看their 和 life cycle 单复数不一致，貌似是这题的突破口。
这是OG对B错误选项的解释：The preposition IN is inappropriate for expressing duration; the plural possessive pronoun THEIR does not agree with the singular antecedent PARASITE. 我看了OG的解释以后问题又来了。
1. B里面的 in part of their life cycle 如果是修饰snails的话， in的用法应该没问题吧。从语义上好像也没有明确的指引这个pronoun到底是指代parasite 还是 snails.
2. 从A选项可以得出，A is B's host for B's life用for. 如果想表达duration in A's life, 应该用A is B's host for A's life 还是 A is B's host in A's life ？
3. A选项里面的parasite's hosts for part of its life cycle貌似和manhattan GMAT SC里的概念不一致。在MG里面pronoun的部分讲过pronoun的指代不优先possessive的形式，从这点看A反而不如B好。。到底在GMAC的标准里有没有这个preference?

求大牛请现身解惑！

-- by 会员 Leonyc (2012/4/15 4:01:40)

求问第二点~求详解~

作者: babybearmm 时间: 2012-4-15 06:22

-- by 会员 Leonyc (2012/4/15 4:01:40)

求问第二点~求详解~

-- by 会员泾渭不凡 (2012/4/15 5:18:12)

这个就是靠理解意思，然后就能逻辑上判断该是for，而不是in
in仅仅表示时空的界定，比如 in 2012, in China
但for表示一种characterization, 比如
This product was developed for the Chinese market.
这里就要用for表示针对the Chinese market，如果用"in"那就仅仅是说研发所位于的地点（这里就non-sense啦）

这道题也是这么理解的，寄居标志着part of its life cycle
所以必须用for表示characterization
如果用in，如OG所说expressing duration

"从语义上好像也没有明确的指引这个pronoun到底是指代parasite 还是 snails"
这个能读出来的，联系全句的意思，是个因果关系，前文关心的是"a disease caused by a parasitic worm"，因此这个pronoun只有指代parasite's才能make sense.

作者: Leonyc 时间: 2012-4-15 07:30
问题3已经解决。manhattan GMAT论坛上Ron对于possessive posion rule的评论：

this is a misinterpretation of the "possessive poison rule".
that rule ONLY forbids a NON-POSSESSIVE PRONOUN from standing for a POSSESSIVE NOUN.

ALL other combinations --
(1) non-possessive noun, non-possessive pronoun;
(2) non-possessive noun, possessive pronoun;
(3) possessive noun, possessive pronoun --
are OK.

this is case (3).

in general, you are better off forgetting all about the "possessive poison" rule.

it has so far been the deciding factor in exactly zero official problems.
worse yet, it is well known to confuse people (look at what happened to you here!)

尤其是最后两句话。。汗。。。

加上饭饭的引用：
pronoun ambiguity is not an absolute rule
the gmat will tolerate pronoun ambiguity when both of the following are satisfied:
1. the intended referent makes much more sense than do the other possible referents,
and
2. the intended referent is PARALLEL TO THE PRONOUN, and the other possible referents are NOT parallel to the pronoun.

作者: 泾渭不凡 时间: 2012-4-15 09:06

2. 从A选项可以得出，A is B's host for B's life用for. 如果想表达duration in A's life, 应该用A is B's host for A's life 还是 A is B's host in A's life ？
3. A选项里面的parasite's hosts for part of its life cycle貌似和manhattan GMAT SC里的概念不一致。在MG里面pronoun的部分讲过pronoun的指代不优先possessive的形式，从这点看A反而不如B好。。到底在GMAC的标准里有没有这个preference?

求大牛请现身解惑！

-- by 会员 Leonyc (2012/4/15 4:01:40)

求问第二点~求详解~

-- by 会员泾渭不凡 (2012/4/15 5:18:12)

-- by 会员 babybearmm (2012/4/15 6:22:35)

谢谢baby姐~~明白咯~~~

作者: Leonyc 时间: 2012-4-15 09:29
恩，谢谢baby姐的解答

。

我回头问下我室友关于问题2的AB互换的可行性

作者: Leonyc 时间: 2012-4-16 03:15

-- by 会员 Leonyc (2012/4/15 4:01:40)

求问第二点~求详解~

-- by 会员泾渭不凡 (2012/4/15 5:18:12)

我刚才问了我一个犹太室友（只会英文），之前V好像是42+吧
问题2， A和B可以互换，意味着类似的句子无视谁的cycle都是用for. 他说in用在这类句子中很怪。

根据他的回答，我加入了点自己的理解：
在这种两者逻辑关系比较紧密地句子for比较好的表达了duration；而in更多的是时间段中的某一个point，对两者的逻辑关系表达不明确，更多的在表达coexsit。

作者: babybearmm 时间: 2012-4-16 03:20
Thanks for sharing~

"问题2， A和B可以互换"
我认为，语法上当然可以互换，但这个句子，从逻辑上讲，互换根本不make sense. 如果你说
Schistosomiasis, a disease caused by a parasitic worm, is prevalent in hot, humid climates, and it has become more widespread as irrigation projects have enlarged the habitat of the freshwater snails that are the parasite's hosts for part of the snails' life cycle.
那么这个句子根本就不make sense!
因为全句关心的是：a disease caused by a parasitic worm
所以就是扣住parasitic worm来推理. 我们只关心worm's life cycle。那么，snails' life cycle，从逻辑上看，就纯粹是out of scope.

作者: Leonyc 时间: 2012-4-16 03:20
小结以下，B有2点有问题。
1. their life cycle 不合逻辑，应该cycles
2. 在这类句子中用for 而不是in

根据我室友的说法，他也很难确定its--parasite's 还是their--snails，所以谨慎判断这个点，避免主观因素加入。

作者: Leonyc 时间: 2012-4-16 03:29

Thanks for sharing~

"问题2， A和B可以互换"
我认为，语法上当然可以互换，但这个句子，从逻辑上讲，互换根本不make sense. 如果你说
Schistosomiasis, a disease caused by a parasitic worm, is prevalent in hot, humid climates, and it has become more widespread as irrigation projects have enlarged the habitat of the freshwater snails that are the parasite's hosts for part of the snails' life cycle.
那么这个句子根本就不make sense!
因为全句关心的是：a disease caused by a parasitic worm
所以就是扣住parasitic worm来推理. 我们只关心worm's life cycle。那么，snails' life cycle，从逻辑上看，就纯粹是out of scope.

-- by 会员 babybearmm (2012/4/16 3:20:15)

的确worm‘s life cycle更好，不过由于是从句不是主句，用这个点判断可能还是有点危险，毕竟有时候1:20-1:30理解可能会有少许偏差，个人觉得按照稳妥一点的方法区别可能速度更快一点。
谢谢baby姐跟贴哈！

作者: babybearmm 时间: 2012-4-16 03:41
类似的题目
The army cutworm moth is a critical source of fat for as many as a third of Yellowstone National Park's grizzly bears; they overturn rocks to find them, as many as 40,000 per bear in a single day.

(A) bears; they overturn rocks to find them, as many as
(B) bears; overturning rocks to find the insects, up to
(C) bears, overturning rocks to find them, as many as
(D) bears, and they overturn rocks to find them, up to
(E) bears, which overturn rocks to find the insects, as many as

Mar 15那次Thursday w Ron. 当时Ron上课讲这道题，有同学提问，蓝色部分到底指的是rocks还是moths。Ron教我们如下推理：
1. Grammar: modifier placement
2. Logic: 全句关心的是moths，那么# of rocks就是out-of-scope.
见附件

这道题同样如此理解:
1. Grammar: parasite's host对应its life cycle
2. Logic: 如果说snail's life cycle，那纯粹是out-of-scope.

-- by 会员 babybearmm (2012/4/16 3:20:15)

-- by 会员 Leonyc (2012/4/16 3:29:52)

作者: Leonyc 时间: 2012-4-16 03:45
受宠若惊，处女贴就受到大牛们的关注，感谢大牛们的帮助！

CD真温暖啊！

作者: Leonyc 时间: 2012-4-16 03:59

类似的题目
The army cutworm moth is a critical source of fat for as many as a third of Yellowstone National Park's grizzly bears; they overturn rocks to find them, as many as 40,000 per bear in a single day.

(A) bears; they overturn rocks to find them, as many as
(B) bears; overturning rocks to find the insects, up to
(C) bears, overturning rocks to find them, as many as
(D) bears, and they overturn rocks to find them, up to
(E) bears, which overturn rocks to find the insects, as many as

Mar 15那次Thursday w Ron. 当时Ron上课讲这道题，有同学提问，蓝色部分到底指的是rocks还是moths。Ron教我们如下推理：
1. Grammar: modifier placement
2. Logic: 全句关心的是moths，那么# of rocks就是out-of-scope.
见附件

这道题同样如此理解:
1. Grammar: parasite's host对应its life cycle
2. Logic: 如果说snail's life cycle，那纯粹是out-of-scope.

-- by 会员 babybearmm (2012/4/16 3:20:15)

-- by 会员 Leonyc (2012/4/16 3:29:52)

-- by 会员 babybearmm (2012/4/16 3:41:04)

确实如此。。
可能bear的那个例子逻辑比较明显，而且就近修饰insects，所以较好区分。parasite这题好像比较容易忽视这个点。。
谢谢baby姐的精彩讲解啊

作者: jacknwsj 时间: 2016-5-9 16:45
In B and E, their (plural) cannot serve to refer to the worm (singular).
Eliminate B and E.

A life cycle is defined as the series of stages through which a living thing passes during the course of its life.
A living thing cannot have more than one life cycle.
Incorrect: a tiger's life cycles
Correct: a tiger's LIFE CYCLE
Thus, in C and D, life cycles (plural) does not convey the intended meaning.
Eliminate C and D.

作者: Jagabee 时间: 2016-12-13 19:31

babybearmm 发表于 2012-4-16 03:41
类似的题目The army cutworm moth is a critical source of fat for as many as a third of Yellowstone Na ...

谢谢baby姐的举的类似题目，过去了将近五年还是对后辈很有帮助.

这道题现在在网上很难找到这么好的解释，原来ron只在video里讲过这题。

作者: danielsu 时间: 2017-6-20 18:53
师兄

作者: 熊大大 时间: 2019-1-7 13:05
不是说一个句子里面的指代词都要指代同一个东西，划线处前面的it已经用来指代disease了吧？

作者: MikaT 时间: 2020-1-8 09:17
哇~~

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