[求助]prep1-98 比较prep-33

ivyfeng

PREP对这题的解释没什么大的问题，但是有一些小的点不大对。

首先，上面提到的which修饰noun phrase的问题，在句子清晰无歧义的情况下，which是可以指代名词词组的，which这个点不是主要的排除点。

其次，关于大家说道的同位语的问题，现需要说明的是less/more这两个词有点特殊（看到过less的解释，以此类推more),他们可以做adj,adv,n 如果PREP语法解释将其理解为同位语，那应该是将其词性定位n，不过lz给出的另一个例子明显是做adj modifier的，这道题不论判定为什么词性都不影响理解和解答。（注：是A中的后一个more than,不是前一个，请看清prep语法笔记）

至于比较对象的问题，大家不要钻牛角尖。这里的比较对象A和B，B肯定就是 all the North American Great Lakes combined.  至于A的话要么是20% of...要么是S Lake，应该是前者。至于C选项除去prep笔记提到的错误，“it holds more of the world's fresh water than all that of the North American Great Lakes combined, 20 percent” 比较也不对，有歧义：到底是（it holds） more of the world's fresh water than（ all that of the North American Great Lakes combined did）还是it holds more （of the world's fresh water ）than （all that of the North American Great Lakes combined），（）内为比较对象。同时那个20%吊在最后很不舒服。

其实 the North American Great Lakes combined就是指 the North American Great Lakes合起来的水

[此贴子已经被作者于2009/9/26 15:33:03编辑过]

Saixss

我觉得其实这两道题均强调的是比较中比较对象要对等的问题，而产生这种表面差异也正是由于要保证比较对象对等的问题。

98题中，B选项如果直接用MORE than 的表达会产生比较对象的缺失或者是比较的歧意：that in the nation要不就是没有比较对象，要不就只能与60对比，不合题意，故a drop就是为了弥补比较的对象所补出的同位语。

而在下一题里，more than 有比较对象可以直接比较

妖怪毛毛

kily8878860

haoa

夜色微蓝

xiaoqiaoli

总感觉33题不懂啊。。。有木有nn过来解答一下啊~~~

mia113

看了N多遍还是不同意解释上说MORE THAN做同位语修饰20% of the world's fresh water.
因为OG上说过同位语修饰  A OF B结构· 应修饰的是A中心语  不是B 也不是整体A B
所以这里MORE THAN如果做同位语的话只能是20%   不可能同lakes combined比较了

记得同位语这个修饰 语法点是来自： translation of liadi(作品名字忘了), a work....
这里得work就是值得translation而非作品本身····
希望有人能帮我解惑吖·
再一次做这题 又错了····哎···

mia113

看到35题 直接更悲催了·
In laboratory rats, a low dose of aspirin usually suffices to block production of thromboxane,
which is a substance that promotes blood clotting, but not seriously interfering with the
production of prostacyclin, which prevents clotting.
(A) which is a substance that promotes blood clotting, but not seriously interfering
(B) a substance that promotes blood clotting, but not seriously interfering
(C) a substance that promotes blood clotting, but does not seriously interfere
(D) which is a substance to promote blood clotting, but does not seriously interfere
(E) which is a substance that promotes blood clotting, but not a serious interference

substance 同位语修饰的是thromboxane,  又是A OF B结构·修饰的却是B  我惶恐了····
哪位好心人士来救救我吖·········

schlaf

Hi All, Following is one of the right answers of GMAT Prep question: Can someone please help me understand how the following comparison is complete. Don't we need "that of" before "all" to complete the comparison. =========================================== More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined. ============================================== There are some examples in OG where it clearly say that in order to complete the comparison we need to have that/those. Can some one please tell why the same is not the case here ? ============================================= The original question is copy pasted below for quick reference. The OA is "A" More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined. A. More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined. B. With 20 percent of the world's fresh water, that is more than all the North American Great Lakes combined, Siberia's Lake Baikal has more than 300 rivers that drain into it. C. Siberia's Lake Baikal, with more than 300 rivers draining into it, it holds more of the world's fresh water than all that of the North American Great Lakes combined, 20 percent. D. While more than 300 rivers drain into it, Siberia's Lake Baikal holds 20 percent of the world's fresh water, which is more than all the North American Great Lakes combined. E. More than all the North American Great Lakes combined, Siberia's Lake Baikal, with more than 300 rivers draining into it, holds 20 percent of the world's fresh water.

We would have used the relative pronoun "that" to refer to fresh water, if we were comparing fresh water.. Here the case is that we are not comparing fresh water capacity of lake baikal with that of other north american lakes..

we are just comparing the total capacity of lake baikal.. its a special quality of lake baikal tht it holds fresh water...

Let's say the total number of litres of the world's fresh water = 100
then Lake baikals capacity out of hundred = 20
Let's say that total capacity of north american lakes = 18

Now all we are saying is that "More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 litres of fresh water, more than all the North American Great Lakes combined.

and so you can see that we don't need to use the relative pronoun..
2.
yeah, ok, i see what you're saying. that's a very good question.

here's what's going on here:
"more than all the North American Great Lakes combined" is actually a MODIFIER of "20% of the world's fresh water", which is WITHIN the first MODIFIER. therefore, it's a SUB-modifier, so to speak.

let me try to illustrate it graphically:

More than 300 rivers drain into Siberia's Lake Baikal(, which holds 20 percent of the world's fresh water(, more than all the North American Great Lakes combined)).

the blue modifier modifies stuff that's inside the orange modifier, so it falls within the orbit of the orange modifier; it MUST be removed if the orange modifier is removed (because it has nothing left to modify).

let me know whether this makes sense.

orange and blue: go gators!

-- by 会员 songgigi (2009/9/5 9:34:00)

这个解释比较好。虽然 还是有一点点模糊。

mysonnic

贴一个。。。。

这道题原句主干是300条河汇入贝加尔湖，两个修饰成分解释说明贝加尔湖。

B 前面是极长的状语，整体结构头重脚轻。用OG常说的话就是awkward。须知很多语法现象，如后置、形式主语  等其实都是在竭力避免这个问题。

C 去掉插入的with结构，主语贝加尔湖和谓语holds之间多了it。把more than 20% 肢解四散到各处，导致more of xxx，比较级后不能用of表示范围，最高级才可以——He is tallest of the three，不可说He is taller of the three.， 同时20% percent成为孤儿成分，不知修饰说明谁或者补充谁，简直不知所谓。

D While引导句子，要么表时间，要么是表转折。逻辑上原句说的是个常态，而不是说当300条河注入时贝加尔湖就淡水丰富堪比北美五大湖总和，而当它们断流时情况就不同了，所以不是表时间的。全句说的只有一个意思，没有相对应和违背的另一层意思，所以也不存在转折关系。因而，不可用while引导。which 引导的定语从句中是个比较结构，which 显然指其前的fresh water，而than的后面是五大湖，不论是否combine, 淡水和湖都是非同质或同态的东西，在GMAT里不可以作为比较结构的双方。

E 一开篇的比较结构用的是多功能的more（原级有many, much，还可加在不能加er/est 的形容词、副词前表比较），而且没有额外补充说明比较的范畴，使人摸不着头脑：到底什么比五大湖多呢？当然并非比较结构不可以放在句首，而是一定要是个明确的比较才可以。看下面：

Longer than any other rivers in China, Changjiang ....

这个比较结构就很明确，因为longer只是long的比较级，非常明确，读者不做它想直接明白比较的是长度。相对的，如果是more， 无法推测到底是many还是much，而many和much可修饰和说明的方面又太多了，所以明确起见可在结构中加以限制说明，如More fresh water than all the NorthAmerican Great Lakes combined, 说明比较的是淡水资源的多少，或者More sendiment of minerals than all the NorthAmerican Great Lakes combined, 说明比较的是水中沉积矿物的多少等。不加说明的比较结构放在句末如A选项，不会有问题，因为前文已经提到fresh water，实际上已经限制了比较的范围。

－－－－－－from laizi
http://forum.chasedream.com/foru ... ight=prep%2B07%2B33