请教比较对象

joywzy

Once positioned in space, the Hubble Space Telescope will capture light from source twenty times fainter compared to those that can be detected by ground based instruments.
A.    compared to those that can be detected
B.    compared to those they can detect
C.    than that can be detected
D.    than those that can be detected
E.    than those detecting
Ans: D,I choose C

第二个比较对象答案说的是sources,我认为应该是light。如何判断第二个比较对象是什么呢？

谢谢。

merlion

我的理解
... capture light from source [(which is) twenty times fainter than those that can be detected by ...], 后面的从句修饰source, source 和source比.

1stzhang

（1）你看看can be detected这个动作的合理发出只能是sources
（2）即使你说的是对的，也要改为that that can be detected，定语从句引导词做主语不能省略

joywzy

以下是引用1stzhang在2003-8-16 9:18:00的发言：
（1）你看看can be detected这个动作的合理发出只能是sources
（2）即使你说的是对的，也要改为that that can be detected，定语从句引导词做主语不能省略

1stzhang,

(1)detect the light，也是可以的吧？

(2)同意。

1stzhang

光是介质，sources是真正要检测的东西，（2）是最关键的错误

sunder

faint修饰light比较合逻辑一点，窃以为这道题应该不算分。

linlin315

我认为twenty times fainter 修饰light比较合理一些。
C. than that can be detected，同意应该为than that that can be detected
D. than those that can be detected，这个选项用those也没有错因为that can be detected by ground based instruments.可以是好几种光。
所以这个比较就是Hubble Space Telescope 探测的光和地球上其它仪器观测的光之间的比较。

joice

the Hubble Space Telescope will capture light from source twenty times fainter than those that can be detected.

the Hubble Space Telescope will capture light twenty times fainter than  that that can be detected.

both are right.  answer is  D.

joywzy

以下是引用joice在2003-8-16 21:07:00的发言：

the Hubble Space Telescope will capture light from source twenty times fainter than those that can be detected.

the Hubble Space Telescope will capture light twenty times fainter than  that that can be detected.

both are right.  answer is  D.

joice, 这两句中的比较对象不一样啊？对吧？都是可以的？

joice

以下是引用joice在2003-8-16 21:07:00的发言：

the Hubble Space Telescope will capture light from source twenty times fainter than those that can be detected.

the Hubble Space Telescope will capture light twenty times fainter than  that that can be detected.

both are right.  answer is  D.

The 1st sentence :  source ---fainter than those (sources)
The second :          light ------fainter than that(light ---uncountable so use 'that')
If compare light, the sentence should  looks like the second one, the " twenty times fainter---" close to LIGHT not to SOURCE.
The 1st sentence is compare sources, answer is D.