以下是引用晓路在2004-4-14 19:55:00的发言：
的确c选项有eye主动register的意思
不过这道题怎么都感觉有点别扭，眼睛register波长而不是波本身？
这个问题最困惑！！
同问！REGISTER这里是意识到的意思吗？
同意,c选项有eye主动register的意思
的确c选项有eye主动register的意思
不过这道题怎么都感觉有点别扭，眼睛register波长而不是波本身？
og234The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye.
(A) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye
(B) however, the wavelength of infrared radiation--0.1 millimeters--is top long to be registered by the eye making it invisible
(C) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long for the eye to register it
(D) however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus invisible
(E) however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible
og解释In C, D, and E the use of the second it is so imprecise as to be confusing.Furthermore, in D, and thus invisible
incorrectly modifies wavelength rather than infrared radiation.
我的问题：为什么d中的it是inprecise的，按照逻辑指代原则，it指代the wavelength of infrared
radiation，那么黄色部份是正确的，当然绿色的在这种情况下错误；反过来，按照ets解释，绿色
不正确原因成立，那么黄色部份的it指代就是清晰的，指代the wavelength。也就是说，按照我对
ets自己的解释的理解，不应该同时出现代词指代和句子谓语修饰的错误，好比“矛和盾”。反
之，est两者都解释正确，那我的理解错误。
不知道我说清楚了没，自己也觉得很搞不清楚，见谅。附上自己的理解，请指教。
我的解释：代词指代不清，指代分句主语还是分句主语的修饰部份，错，当所有各为主语时，其
后的代词指代可能产生指代不清得问题；谓语动词修饰错误，原句意思infrared radiation is
invisible，这里变成the wavelength of infrared radiation is thus invisible,
请求指点，谢谢大家。
附：1、本题中it不应该前句主语，依据见og232
232. Unlike auto insurance, the frequency of claims does not affect the premiums for personal property coverage, but if the insurance company is able to prove excessive loss due to owner negligence, it may decline to renew the policy.
2、it可以指代所有格整个部份，包括名词及其修饰部份，依据见og231b解释
231. Ms. Chambers is among the forecasters who predict that the rate of addition to arable lands will drop while those of loss rise.
(A) those of loss rise
(B) it rises for loss
In B, it refers to the rate of addition; consequently, B makes the nonsensical statement that the rate of addition... rises for loss
(D)中的it是指代wavelength没错, 只是语法上指代没错, 逻辑上指代却错误.....至于OG里头的解释是写的太简洁, 我们可以把furthermore那句当成对上句的补充......
it仍然优先指代本句主语，但有可能在此过程中发生逻辑指代错误，例如成为其后动词的错误逻辑主语，这样，这个it就发生了a kind of imprise problem，所以，错.
请牛牛指正。
把错误答案D代入后：The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus invisible.
1、如说it指代the wavelength of infrared radiation ，指代清晰没问题；则，thus invisible就不合逻辑了，因为看见看不见都是说红外线的，不是说看见看不见波长。2、如果说thus invisible是对的，那就是说it指代的是infrared radiation ，这在语法上讲it又对了，因为在句子里语法上讲指代的不是infrared radiation。你所说的矛盾。
我是不是理解了你10楼的意思？
11楼说的是对的。
不过这道题怎么都感觉有点别扭，眼睛register波长而不是波本身？
为什么眼睛register波长而不是波本身？这属于生物概念？
(A) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye.
I feel confused, even about answer A. Gramatically, wavelength is registed by the eye, however, logically, radiation should be registered by the eye. To correct it, ETS should change it to something as below:
infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long for the eye to register the radiation.
for discussing...
的确c选项有eye主动register的意思
不过这道题怎么都感觉有点别扭，眼睛register波长而不是波本身？
这个问题最困惑！！
| 以下是引用晓路在2004-4-14 19:55:00的发言： 的确c选项有eye主动register的意思 不过这道题怎么都感觉有点别扭，眼睛register波长而不是波本身？ 这个问题最困惑！！ 同问！REGISTER这里是意识到的意思吗？
|
re.
register verb :transitive senses:
4 : to convey an impression of : EXPRESS
(M-w)
关于register的东东到底是什么重要吗，如果非要搞清楚，肯定得翻生物、物理课本啦
你们会去翻吗?
肯定不会
那就take it for granted吧，as A stated.
刚刚查了longman，发现too...to的两种用法，也许对这道题有帮助
too ... to do something
He was too ill to travel.
too ... for somebody to do something
The box was too heavy for me to lift.
我理解c选项曲解了原意，因为too long for the eye to register it按照longman 的解释应理解为波长对眼睛register it而言太长了，而不是说波长对眼睛而言太长了，以至于不能register it。所以与原句意思不一致，错误。
fTotally agree with it.
I got a question:
e) however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible.
1)I used to think those two noun make "it" vague. 但是不是有代名词优先替代原句主词的文法吗?
2)再来, 句尾的participial 用法不是常常拿来修饰主语吗?
ex. #154 In 1791 Robert Carter 3, one of the wealthiest plantation owners in Virginia, stunned his family, friends, and neighbors by filing a deed of emancipation, setting free the more than 500 slaves who were legally considered his peroperty
3)又来, 这里感觉又像是修饰前面的句子...
4) 最后, 那IT到底有没有修饰上的ambiguity 呢?
谢谢指导...
我想问的是：Furthermore, in D, and thus invisible incorrectly modifies wavelength rather than infrared radiation
是什么意思？thus invisible在句中做什么成分？形容词做状语嘛？还是后置定语，怎么会讨论到修饰主句主语的分上乐？
我想请教各位D中的it有什么问题么？我感觉D中的it指代很清楚啊--指代wavelength.(尽管我知道D有其他错误），但是为何ETS说这里D有问题啊？
请教！谢谢
og解释In C, D, and E the use of the second it is so imprecise as to be confusing.Furthermore, in D, and thus invisible
incorrectly modifies wavelength rather than infrared radiation
我想这里OG说法有点问题，除了C选项以外，D和E里都只有一个it啊？难道选项里面有印刷错误？
总结一下问题：
(1) register 什么，是wavelength还是infrared radiation，哪一个表达更准确？（属于生物科技问题）
不过在google上面只能收缩到eyes register ...light，如紫外线、红外线、光等，而没有register 波长、辐射。如果infrared radiation理解为红外线的话，可以用register。
（2）C选项中 because its wavelength—0.1 millimeters—is too long for the eye to register it，这里最后的it指代的是wavelength还是infrared radiation。后者依据同一句话中代词指代相同的原则
以上问题，请讨论！
(A) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye.
I feel confused, even about answer A. Gramatically, wavelength is registed by the eye, however, logically, radiation should be registered by the eye. To correct it, ETS should change it to something as below:
infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long for the eye to register the radiation.
for discussing...
Same confusion.
Can eye register wavelength?
I think eye can register light but not wavelength.
So answer A is ambigious too. hang?
Please help.
我想问的是：Furthermore, in D, and thus invisible incorrectly modifies wavelength rather than infrared radiation
是什么意思？thus invisible在句中做什么成分？形容词做状语嘛？还是后置定语，怎么会讨论到修饰主句主语的分上乐？
刚刚查了longman，发现too...to的两种用法，也许对这道题有帮助
too ... to do something
He was too ill to travel.
too ... for somebody to do something
The box was too heavy for me to lift.
我理解c选项曲解了原意，因为too long for the eye to register it按照longman 的解释应理解为波长对眼睛register it而言太长了，而不是说波长对眼睛而言太长了，以至于不能register it。所以与原句意思不一致，错误。
234. The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye.
(A) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye
(B) however, the wavelength of infrared radiation--0.1 millimeters--is top long to be registered by the eye making it invisible
(C) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long for the eye to register it
(D) however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus invisible
(E) however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible
上帝啊，经过了漫长的1个半小时，终于把这题搞清楚了
红外线---不可见
波长 ----register（原因：不知道为什么用这个词，只好背下来了。）？？？？？？？？？？？？？？？/
C选项 infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long for the eye to register it 第1个it指红外线，第1个it指前面的its wavelength，两个it都是在分号后面的同一个分句中，指代不一致。
同样的例题是OG10-83，即OG11-84
83. (A) a condition when it is present and indicate that there is one (B) when a condition is present and indicate that there is one (C) a condition when it is present and indicate that it is present (D) when a condition is present and indicate its presence (E) the presence of a condition when it is there and indicate its presence E选项，前面的its presence中的it指condition，后面的when it is not中的it 指的是its presence ,两个it前后指代不一致，所以错。
Any medical test will sometimes fail to detect a condition when it is present and indicate that there is one when it is not.
83.
Any medical test will sometimes fail to detect a condition when it is present and indicate that there is one when it is not.
(A) a condition when it is present and indicate that there is one
(B) when a condition is present and indicate that there is one
(C) a condition when it is present and indicate that it is present
(D) when a condition is present and indicate its presence
(E) the presence of a condition when it is there and indicate its presence
E选项，前面的its presence中的it指condition，后面的when it is not中的it 指的是its presence ,两个it前后指代不一致，所以错。
83.
Any medical test will sometimes fail to detect a condition when it is present and indicate that there is one when it is not.
(A) a condition when it is present and indicate that there is one
(B) when a condition is present and indicate that there is one
(C) a condition when it is present and indicate that it is present
(D) when a condition is present and indicate its presence
(E) the presence of a condition when it is there and indicate its presence
E选项，前面的its presence中的it指condition，后面的when it is not中的it 指的是its presence ,两个it前后指代不一致，所以错。
我觉得amy已经解释的很明白啦！
不过考试时候，不认得红外线怎么办？
的确c选项有eye主动register的意思
不过这道题怎么都感觉有点别扭，眼睛register波长而不是波本身？
我也觉得奇怪，到底是什么 to be registered 呢？
应该是波本身，而不是波长吧？
前面的NN还是没有说通啊：（
难道 too…… to……可以不是一个主语？
OG中，In C, D, and E the use of the second
it is so imprecise as to be confusing.
我的理解是
The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters;
infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye.
两个IT指代不同东西
这题好难呀！
同意39楼的说法。可以排除C。但是对register wavelength or IR还是有疑问。倾向于register IR。
下面是我对这个题的分析和理解：
234. The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters;
infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye.
(A) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye
(B) however, the wavelength of infrared radiation--0.1 millimeters--is top long to be registered by the eye making it invisible (修饰eye, 而不是修饰radiation)
(C) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long for the eye to register it (it 直待不清楚，因为从句because的引导，it 直待了because后面出现的主语，wavelength, 因此register it就表明register wavelength, 而不是register radiation.意思错误)
(D) however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus （省略了it is 这里的it = the wavelength,所以说wavelengh is invisible 也错误） invisible
(E) however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible （it直待不清楚，并且that引导的限定定语从句限定了0。1波长的范围，而不是描述他们的共有特性）
Choice A, the best answer, is clear, idiomatic, and grammatically correct. In B, the misplaced participial phrase making it invisible modifies eye rather than wavelength, thus producing a confusing statement that distorts the meaning. In C, D, and E the use of the second it is so imprecise as to be confusing. Furthermore, in D, and thus invisible incorrectly modifies wavelength rather than infrared radiation.
Choice E produces an illogical statement by using a restrictive clause introduced by that where a comma followed by the nonrestrictive "which" is required: a wavelength of 0.1 millimeters that is too long nonsensically suggests that not all wavelengths of 0.1 millimeters are too long for the eye to register.
我觉得这个题目的答案能够理解，但问题是如果在考场碰到这样的题目，应该如何迅速解题呢？
思考的思路是什么？
OG中，In C, D, and E the use of the second
it is so imprecise as to be confusing.
我的理解是
The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters;
infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye.
两个IT指代不同东西
不同意.OG是说第2个it指代不清.在两个以分号分开的独立句子里,it可以指代不同的事物.
下面是我对这个题的分析和理解：
234. The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters;
infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye.
(A) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye
(B) however, the wavelength of infrared radiation--0.1 millimeters--is top long to be registered by the eye making it invisible (修饰eye, 而不是修饰radiation)
(C) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long for the eye to register it (it 直待不清楚，因为从句because的引导，it 直待了because后面出现的主语，wavelength, 因此register it就表明register wavelength, 而不是register radiation.意思错误)
(D) however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus （省略了it is 这里的it = the wavelength,所以说wavelengh is invisible 也错误） invisible
(E) however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible （it直待不清楚，并且that引导的限定定语从句限定了0。1波长的范围，而不是描述他们的共有特性）
Choice A, the best answer, is clear, idiomatic, and grammatically correct. In B, the misplaced participial phrase making it invisible modifies eye rather than wavelength, thus producing a confusing statement that distorts the meaning. In C, D, and E the use of the second it is so imprecise as to be confusing. Furthermore, in D, and thus invisible incorrectly modifies wavelength rather than infrared radiation.
Choice E produces an illogical statement by using a restrictive clause introduced by that where a comma followed by the nonrestrictive "which" is required: a wavelength of 0.1 millimeters that is too long nonsensically suggests that not all wavelengths of 0.1 millimeters are too long for the eye to register.
这道题C选项很好排除 C中唯一的错误就是句尾的it指代多余（指代wavelength） 造成了roundabout.
即wavelength is too long to register(the wavelength)
这是GMAC常见的小把戏
下面是我对这个题的分析和理解：
234. The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters;
infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye.
(A) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye
(B) however, the wavelength of infrared radiation--0.1 millimeters--is top long to be registered by the eye making it invisible (修饰eye, 而不是修饰radiation)
(C) infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long for the eye to register it (it 直待不清楚，因为从句because的引导，it 直待了because后面出现的主语，wavelength, 因此register it就表明register wavelength, 而不是register radiation.意思错误)
(D) however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus （省略了it is 这里的it = the wavelength,所以说wavelengh is invisible 也错误） invisible
(E) however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible （it直待不清楚，并且that引导的限定定语从句限定了0。1波长的范围，而不是描述他们的共有特性）
Choice A, the best answer, is clear, idiomatic, and grammatically correct. In B, the misplaced participial phrase making it invisible modifies eye rather than wavelength, thus producing a confusing statement that distorts the meaning. In C, D, and E the use of the second it is so imprecise as to be confusing. Furthermore, in D, and thus invisible incorrectly modifies wavelength rather than infrared radiation.
Choice E produces an illogical statement by using a restrictive clause introduced by that where a comma followed by the nonrestrictive "which" is required: a wavelength of 0.1 millimeters that is too long nonsensically suggests that not all wavelengths of 0.1 millimeters are too long for the eye to register.
这道题C选项很好排除 C中唯一的错误就是句尾的it指代多余（指代wavelength） 造成了roundabout.
即wavelength is too long to register(the wavelength)
这是GMAC常见的小把戏
不同意你们的说法。
既然A是正确答案，就说明eye能够register的是wavelength而不是infrared radiation。
所以C中的最后一个单词it错误的原因就只能是它指代了wavelength以外的名词。
按照以上这个逆向推理过程，我们可以发现第二个it指代的应该是infrared radiation。支撑这个观点的论据除了以上的推理过程外，还有第二点：
第二、一个句子（分号前分句和分号后分句算两个独立句子）中的同一个代词应该指代一致（经典题OG10-83或者OG11-V-85），本题C中分号后已有its指代主语infrared radiation，本句中的其它it也就应该指代infrared radiation，否则一定会产生指代混乱。
当然，这道题除了要搞清楚its，it指代的应该是infrared radiation外，
还需要明确的两个比较易混的（或者说跟中文逻辑不大一样的）逻辑要点是：eye register什么？是wavelength
invisible的是什么？是infrared radiation
最后结合前人所说的不同词组结构的主动与被动倾向，这道题就应该能解决了。
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