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标题: GWD-2-19 [打印本页]
作者: valarie    时间: 2004-9-10 02:15
标题: GWD-2-19

Q19:


Sunflowers growing in pots were placed, with their roots submerged, in the pond contaminated with radioactive elements.  The sunflowers kept growing; in the process, they absorbed radioactive elements.  Within twelve days, 85 percent of the radioactive elements were removed from the water, which is no less than can be accomplished with the much more expensive conventional filtration techniques.  Scientists therefore propose using sunflowers for decontamination wherever there are radioactively contaminated ponds.





Which of the following, if true, points to a limitation on the applicability of the proposed method of decontamination?






  1. Some plants other than sunflowers can also remove radioactive elements from water.

  2. The water in many ponds contaminated with radioactive elements is so cold that it would kill sunflowers whose roots were submerged in it.

  3. Sunflowers that grow with their roots submerged in water grow less well than sunflowers growing under optimal conditions on dry land.

  4. Only species of sunflowers with large leaves can have their roots submerged in water and still keep growing.

  5. In ponds in which the circulation of the water is artificially increased, sunflowers absorb radioactive elements far faster than they do in other ponds.

   Answer: ? Thanks


作者: lip00ff2002    时间: 2004-9-10 06:01
B
作者: joe11    时间: 2004-9-10 11:42

Agree with B.

作者: bryan0806    时间: 2004-9-10 12:07
B
作者: valarie    时间: 2004-9-10 12:24
Thanks.
作者: swlfx    时间: 2005-7-22 18:35
YES IT IS B。
作者: smileday    时间: 2006-6-17 12:00
以下是引用valarie在2004-9-10 2:15:00的发言：

Q19:

Sunflowers growing in pots were placed, with their roots submerged, in the pond contaminated with radioactive elements.  The sunflowers kept growing; in the process, they absorbed radioactive elements.  Within twelve days, 85 percent of the radioactive elements were removed from the water, which is no less than can be accomplished with the much more expensive conventional filtration techniques.  Scientists therefore propose using sunflowers for decontamination wherever there are radioactively contaminated ponds.

Which of the following, if true, points to a limitation on the applicability of the proposed method of decontamination?

  1. Some plants other than sunflowers can also remove radioactive elements from water.
  2. The water in many ponds contaminated with radioactive elements is so cold that it would kill sunflowers whose roots were submerged in it.
  3. Sunflowers that grow with their roots submerged in water grow less well than sunflowers growing under optimal conditions on dry land.
  4. Only species of sunflowers with large leaves can have their roots submerged in water and still keep growing.
  5. In ponds in which the circulation of the water is artificially increased, sunflowers absorb radioactive elements far faster than they do in other ponds.

   Answer: ? Thanks


so, B means that the ponds surveyed and the ponds intended to be applicated are different?

otherwise, B would be incorrect ?

作者: Qunnie    时间: 2007-11-18 14:42

我选的D。

B中说is so cold that it would kill sunflowers whose roots were submerged in it.

但是文中已经说了The sunflowers kept growing

所以如果选B不就是反对前提了吗？？

D是对该措施的可行性提出问题，所以是weaken，不是吗？

作者: even2007    时间: 2007-11-18 16:59
可是D不能算是削弱，結論還是成立的啊。但B也的確有問題。哪位來給個完整的解釋啊
作者: apostlep43    时间: 2007-11-18 17:17
The Key word is "limitation". B clearly identify the limitation that the method can not be applied to some bonds with low temperature.
作者: craigchsieh    时间: 2008-8-7 17:23
以下是引用valarie在2004-9-10 2:15:00的发言：

Q19:

Sunflowers growing in pots were placed, with their roots submerged, in the pond contaminated with radioactive elements.  The sunflowers kept growing; in the process, they absorbed radioactive elements.  Within twelve days, 85 percent of the radioactive elements were removed from the water, which is no less than can be accomplished with the much more expensive conventional filtration techniques.  Scientists therefore propose using sunflowers for decontamination wherever there are radioactively contaminated ponds.

请问这里怎么解释啊？是种花这方法没有比较便宜吗？感觉作者态度怪怪的～

作者: 伯爵奶茶    时间: 2009-4-2 15:52
同GWD-1-Q15和GWD-1-Q33的套路：方法→目的  则support或者weaken应从方法可行性上施加作用
[此贴子已经被作者于2009-4-2 15:52:43编辑过]
作者: a9141067s    时间: 2009-7-26 19:13

还是不太明白呀!

哪位 NN可以帮忙解释一下吗?

thanks





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