答案选D，为什么呢？此处interfering with pacemakers 做什么成分呢？
作者: jandjshi 时间: 2006-4-19 13:38
奇怪? the magnetic fields emitted by one manufacturer’s security surveillance system, 200,000 of which type exist worldwide, interfering with pacemakers. 谓语呢?
我支持A.
作者: 润Z细无声 时间: 2006-4-19 13:49
是啊，我选的也是a,想法和你一样，如果选择D，就会没有the magnetic fields的谓语了。是不是还有什么隐晦的地方没有看出来呢？
作者: jandjshi 时间: 2006-4-19 14:39
难道D中the magnetic fields and this interaction作主语? can bring做谓语? 那也太awkward了吧!
作者: 润Z细无声 时间: 2006-4-19 16:11
如果选D的话，似乎只能这样解释了
作者: yhzh 时间: 2006-4-19 16:57
只有D最idiomatic,"2000" should be in front of " of which", "interfering" is present participle.
作者: 润Z细无声 时间: 2006-4-19 21:05
谢谢jandjshi和yhzh，我的一个朋友解释说：
首先排除ABC，因为OF WHICH这样的用法只会导致语义含混，相信你读起来也不太顺口吧，呵呵，D和E就好排除了。主要是个语感的问题。
可是我还是不大明白，此句的谓语是谁呢？
作者: jandjshi 时间: 2006-4-20 02:16
D不对. the magnetic fields emitted by one manufacturer’s security surveillance system, 200,000 of which type exist worldwide, interfering with pacemakers
两个硬伤. 1) 没谓语 2) interfering present participle 在句中修饰surveillance system. 而句子逻辑上看应该是修饰emitted, 动作分出者应是magnetic fields.
A: announced that X can interfere, and that Y can bring on - 句型工整对称. of which type there are 200,000 worldwide可不可以理解为介短提前?
作者: 润Z细无声 时间: 2006-4-20 14:02
作者: titatita 时间: 2006-6-8 11:24
支持a,agree8 floor
作者: titatita 时间: 2006-8-4 10:04
up
作者: superPPDD 时间: 2006-8-13 14:48
顶
作者: jinni 时间: 2006-8-15 16:08
感觉从句意上来说还是A比较好，整个句子的意思是说磁场和pacemakers会相互作用，而这种相互作用会带来missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting等问题，
如果选D，主语变成了the magnetic fields and this interaction，逻辑意思不符合。
作者: 当当84 时间: 2006-8-26 14:06
Q20:
Researchers have announced that the magnetic fields emitted by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.
- of which type there are 200,000 worldwide, can interfere with pacemakers and that
- of which, worldwide, there are 200,000 of that type, and which can interfere with pacemakers, and
- of which type there are 200,000 worldwide, they can interfere with pacemakers and
- 200,000 of which type exist worldwide, interfering with pacemakers, and
- 200,000 of that type existing worldwide and can interfere with pacemakers, and
重新贴题讨论一下，
这里的200, 000 of which type exist worldwide是做什么成份，which一定是指代前面的the magnetic fields emitted by one manufacturer’s security surveillance system,那么有没有可能把200, 000 of which type 看成是that 从句中的主语哪？如果可以则谓语动词就存在了是exist .
另外这里是this interaction 感觉上是指代前面的内容，如果变成了announced that...and that结构好像把这个关联弄断了。
请NN指导！！
作者: tokyolove 时间: 2006-8-26 17:35
同意Janjishi!!!!
作者: greentree_du 时间: 2006-9-2 07:26
请大牛指点一下此题。
究竟是哪个 答案。
作者: soloenti 时间: 2006-9-16 11:45
後面是用 this interaction 代表先前提过相同的观念 如果选A 则应该是用the interaction 选D
作者: tomwalkson 时间: 2006-10-6 17:50
这题答案错了，应该是A。
announeced that ... can, and that ...can, 平行结构的正确使用，逻辑意思也表达清楚正确。
作者: jsj_gill 时间: 2006-10-6 19:27
i choose a,but i still think the structure 'of which' is strange.
which one is the correct answer?
作者: ecochem 时间: 2006-10-15 06:16
谢谢jandjshi和yhzh，我的一个朋友解释说：
首先排除ABC，因为OF WHICH这样的用法只会导致语义含混，相信你读起来也不太顺口吧，呵呵，D和E就好排除了。主要是个语感的问题。
可是我还是不大明白，此句的谓语是谁呢？
实在不同意高亮部分的说法，大全里面也有of which的用法，例子如下
33.A substance derived from the Madagascar periwinkle, which has proved useful in decreasing mortality among young leukemia patients, is cultivated in China as part of a program to integrate traditional herbal medicine into a contemporary system of health care.
(A) A substance derived from the Madagascar periwinkle, which has proved useful in decreasing mortality among young leukemia patients,
(B) A derivative, which has proved useful in decreasing mortality among young leukemia patients, of the Madagascar periwinkle,
(C) A Madagascar periwinkle derivative, which has proved useful in decreasing mortality among young leukemia patients,
(D) The Madagascar periwinkle has a derivative which has proved useful in decreasing mortality among young leukemia patients, that (E)
(E) The Madagascar periwinkle, a derivative of which has proved useful in decreasing mortality among young leukemia patients,
426.India is country with at least fifty major regional languages, of whom fourteen have official recognition.
(A) of whom fourteen have official recognition
(B) fourteen that have official recognition
(C) fourteen of which are officially recognized
(D) fourteen that are officially recognized (C)
(E) among whom fourteen have official recognition
738.The Emperor Augustus, it appears, commissioned an idealized sculptured portrait, the features of which are so unrealistic as to constitute what one scholar calls an “artificial face.”
(A) so unrealistic as to constitute
(B) so unrealistic they constituted
(C) so unrealistic that they have constituted
(D) unrealistic enough so that they constitute (A)
(E) unrealistic enough so as to constitute
并且of which 在本句也不觉得语意含混
所以我还是支持A！
作者: Iawfy 时间: 2006-10-15 06:40
A 绝对错
of which 的修饰方法 错
there are结构 错
所以排除ABC
Researchers主句主语
have announced 谓语+宾语从句
the magnetic fields 主语
emitted 谓语
of which type代指one manjufacturer's security surveillance system
interfering with pacemakers修饰前边宾语从句
and后的句子并不是语法上的平行，而是意思上的平行
this interaction 与 interfering
作者: linda816 时间: 2006-10-18 07:32
感觉从句意上来说还是A比较好，整个句子的意思是说磁场和pacemakers会相互作用，而这种相互作用会带来missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting等问题，
如果选D，主语变成了the magnetic fields and this interaction，逻辑意思不符合。
同意，D的话逻辑意思错误。A is the best!
逻辑第一，形式第二
作者: 幽幽sally 时间: 2006-10-19 21:38
２０楼说的都是“n+of which”, 那是非限制性定语从句
跟这里的of which不是一回事儿～
我个人理解这里的意思和 of three people, tom is the tallest 类似
如果选A, 那后边的that变成与Researchers have announced that 平行了，问题来了，后边的this interaction无所指了
D也不对，无谓语了， interfering with算怎么回事儿啊～～
综上所说．．．本人认为没答案．．．猜测可能是测试题目
open to discuss
作者: 幽幽sally 时间: 2006-10-19 21:45
A 绝对错
of which 的修饰方法 错
there are结构 错
所以排除ABC
Researchers主句主语
have announced 谓语+宾语从句
the magnetic fields 主语
emitted 谓语 这里怎么可能是谓语，明显是修饰the magnetic fields的啊
of which type代指one manjufacturer's security surveillance system
interfering with pacemakers修饰前边宾语从句
and后的句子并不是语法上的平行，而是意思上的平行
this interaction 与 interfering
作者: Winbolin 时间: 2006-10-21 20:34
同意，D的话逻辑意思错误。A is the best!
逻辑第一，形式第二
這題答案應該是A.
D並沒有謂語can跟後面的 can 平行阿, 何況,
A. of which type there are 200,000跟 D.的200,000 of which type exist表達的意思根本就不一樣, 這個地方應是個插入語, 附帶修飾前面 system, 而D完全易客為主, 轉移了句子的重心.
作者: powerlich 时间: 2006-10-24 16:03
顶
作者: MaccMichAA 时间: 2006-10-25 10:48
...
作者: beibei649 时间: 2006-10-25 15:33
同样支持A，虽然本人很菜，哈哈
作者: aborigin 时间: 2006-11-6 22:08
nicoleinca为大家搜到相关证据了。应该是A
gwd30-20 google到一半答案，是A
作者: cjyzxj 时间: 2006-11-15 13:05
支持A
D没有谓语
作者: cjyzxj 时间: 2006-11-15 13:17
在GMAT正式考试中（比如GMATPREP)，很多观念都可能被颠覆。因为英语毕竟是语言，丰富多样。GMAT考的是相对正确的选项。如果想得高分，最好不要有什么“XXX必错”这类设定，除非是主谓不一致、无谓语等等硬伤，很多是我们中学英语里学的公理。
除此之外，我们从GMAT复习中总结出来的经验，即使是OG里所说“XXX"不是很好，也不能就此将此定为必错。当AB是某题的主要矛盾是，如果A>B，则选A。但是如果另外一题CD是更大的矛盾，则B就可能是正确选项。
象此题，没有谓语这么大的硬伤，当然比什么of which 读起来不爽来的重要地多。
因此，选A
作者: http1303cc 时间: 2006-11-20 06:29
A
作者: chang2301 时间: 2006-11-25 23:21
A 绝对错
of which 的修饰方法 错
there are结构 错
所以排除ABC
Researchers主句主语
have announced 谓语+宾语从句
the magnetic fields 主语
emitted 谓语
of which type代指one manjufacturer's security surveillance system
interfering with pacemakers修饰前边宾语从句
and后的句子并不是语法上的平行，而是意思上的平行
this interaction 与 interfering
我來還原原句好了
Researchers have announced that
the magnetic fields (which are) emitted (所以emitted不是谓语) by one manufacturer’s security surveillance system, of which type there are 200,000 worldwide, can interfere with pacemakers and
that this interaction can bring on missed or irregular heartbeats, nausea, breathlessness, dizziness, and even fainting.
這個句子前後平行主謂清楚
沒有什麼可懷疑的
作者: heshaohua666 时间: 2006-12-13 18:01
ok
作者: davidhuang 时间: 2006-12-28 06:23
GREAT!!
A
作者: liubin1987 时间: 2007-2-8 17:05
恩....同支持A
作者: LOUI1121 时间: 2007-2-11 01:00
选A，A中的OF WHICH TYPE THERE ARE 200，000。。。，可能是倒装。变成正式语序就是THERE ARE 200，00OF THAT TYPE。
作者: xiaoniuren 时间: 2009-4-19 21:40
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