费费宝典第39题

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39. Quasars---celestial objects so far away that their light takes at least 500 million years to reach Earth---have been seen since 1963. For anything that far away to appear from Earth the way quasars do, it would have to burn steadily at a rate that produces more light than 90 billion suns would produce. But nothing that burns at a rate that produces that much light could exist for more than about 100 million years.
If the statements above are true, which one of the following must also be true on the basis of them?
(A) Instruments in use before 1963 were not sensitive enough to permit quasars to be seen.
(B) Light from quasars first began reaching Earth in 1963.
(C) Anything that from Earth appears as bright as a quasar does must produce more light than would be produced by 90 billion suns.
(D) Nothing that is as far from Earth as quasars are can continue to exist for more than about 100 million years.
(E) No quasar that has ever been seen from Earth exists any longer.

答案是E,它是指比什么长(exists any longer than what?),死活想不通，C不对吗？

番茄炒蛋

呵呵，既然我们看到得是五百万年前得星星，而这种星星又最多只能存在一百万年
所以等到我们看到它得时候，它肯定已经是烧光咯，就没有了咯
也就是我们看到得实际上已经是不存在得咚咚了

2045977

感觉这个题目和答案有矛盾，既然要走五百万年才能看到，而本身又只有一百万年的寿命，那1963年是怎么看到quasars的？

为什么D不对呢？

[此贴子已经被作者于2004-4-17 16:57:32编辑过]

asteller

我觉得C也没有错啊

那些和quasars一样的亮的星星要产生90 billion太阳的光亮

这不是重复了题目第二句话的意思吗？

joe11

The question is asking you a Conclusion based on the statement provided. Any copy of the original sentence could never be the conclusion/answer. The answer "cannot be a restatement of a sentence" (Princeton Review on GMAT 2003). Therefore, C is inproper.

Other tips by Princeton:

   Support all evidences in the passage, not just part of all premises.

   Out of scope choices are wrong.

Also, a conclusion is what the auther attemping to draw following the statement. You need to fill the last gap.

However, make sure you don't confuse the Conclusion questions with Infer questions.

kevinwww

以下是引用asteller在2004-4-26 9:44:00的发言：

我觉得C也没有错啊

那些和quasars一样的亮的星星要产生90 billion太阳的光亮

这不是重复了题目第二句话的意思吗？

别忘了第二句还有个条件"For anything that far away to appear from Earth the way quasars do" 就是说要和quasars一样远!

如果它比quasars离地球近就不需要90 billion太阳的光亮, 也能产生一样的亮度(从地球上看)!

kevinwww

以下是引用2045977在2004-4-17 16:51:00的发言：

感觉这个题目和答案有矛盾，既然要走五百万年才能看到，而本身又只有一百万年的寿命，那1963年是怎么看到quasars的？

为什么D不对呢？

1963年看到的是500万年前的quasars星,(因为路远要走500万年), 虽然至少400万年前quasars已经消失掉了!

哈哈穿越时空!!!

D少了个条件："to appear from Earth" , 没有提能否被地球看到

(D) Nothing (that can be seen from Earth)that is as far from Earth as quasars are can continue to exist for more than about 100 million years.

[此贴子已经被作者于2004-5-7 21:11:54编辑过]

kevinwww

如果我们制造出比光速快的飞行器(比如快1000倍),那么我们就可以飞到足够远的地方(比如飞2年), 从而在那里看到地球上1000年前发生的事情(如果我们能制造出在这么远的地方依可以观察到地球发出的光的仪器)

高速飞行器+高感光仪器, 可以让我们回到过去(只是看)!!!  

kekegrace

别忘了第二句还有个条件"For anything that far away to appear from Earth the way quasars do" 就是说要和quasars一样远!

请教这句话是什么语法结构，就能翻译出这样的中文意思？请教高手和版主！

kekegrace

请教这句话是什么语法结构，就能翻译出这样的中文意思？请教高手和版主！

哦，我已经搞清楚了。appear为系动词，the way是表语，quasars do 修饰the way。不过还请版主和高手确认一下哦。

[此贴子已经被作者于2004-7-18 10:47:15编辑过]