GWD5-Q36，GWD6-Q6

snoopydior

GWD-5-Q36:

It can be inferred from the passage that when aspen groves experience a “disturbance” (line 30), such a disturbance

             

1. leads to a hormonal imbalance within an aspen clone

2. provides soil conditions that are favorable for new shoots

3. thins out aspen groves that have become overly dense

4. suppresses the formation of too many new aspen stems

5. protects aspen groves by primarily destroying coniferous trees rather than aspens

If a clone
   loses many stems simultaneously, the
   resulting hormonal imbalance triggers a
   huge increase in new, rapidly growing
   shoots that can outnumber the ones
   destroyed.  An aspen grove needs to
   experience fire or some other disturbance
   regularly, or it will fail to regenerate and
   spread.

不明白disturbance如果和fire的作用一样，应该是对白杨好的呀？为什么是相反的结果呢？

哪位高人给我指点一下这其中的关系？

万分感谢！

GWD-6-Q6:

 Which of the following, if true, would most weaken Krech’s objections to Martin’s theory?

             

A.      Further studies showing that the climatic change that occurred at the end of the Pleistocene era was even more severe and widespread than was previously believed

B.     New discoveries indicating that Paleoindians made use of the small animals, plants, and insects that became extinct

C.     Additional evidence indicating that widespread climatic change occurred not only at the end of the Pleistocene era but also in previous and subsequent eras

D.     Researchers’ discoveries that many more species became extinct in North America at the end of the Pleistocene era than was previously believed

E.     New discoveries establishing that both the arrival of humans in North America and the wave of Pleistocene extinctions took place much earlier than 11,000 years ago

为什么c不对呢？指出气候变化在灭绝的前后都有不可以削弱K认为气候变化也是一个影响因素-即反驳M观点吗？

真的不明白...

[此贴子已经被作者于2007-6-20 0:34:33编辑过]

lv1015

好像fire与disturbance之间有差距,但原文中有把两者一起来说,An aspen grove needs to (30) experience fire or some other disturbance regularly, or it will fail to regenerate and spread.做这题不能加入联想,一丁儿也不行.火和其他灾害把一部分杀死后，必然导致的一个结果是荷尔蒙的不平衡，最直接的结果，关于楼主的疑问，由原文你可以看出这种自残式的方式是可以使新的生命体出现，这是件好事。

道光

应该问题是问most weaken，C也对，但是重要度不及B，这个是按照原文作者陈述顺序来看的。

mcyinhbs

楼上关于GWD-6-Q6的解释是不是有点牵强阿？？？

有哪位牛人能提供更有说服力的解释么？

nerakuhs

GWD6-Q6我也是选了c，不过现在想想c确实不够好，因为原文只是讲到 M没有吧climate change考虑进去，也就是说M的theory并没有降到关于climate方面，因此，现在有additional的evidence并不能weaken M‘s theory，因为M根本没有谈到。

而文中M 说到：the wave of species extinctions  can be directly attributed to the arrival of humans, i.e., the Paleoindians, who were ancestors of modern Native Americans. 这时候，K跳出来points out that large animal species vanished even in areas where there is no evidence to demonstrate that Paleoindians hunted them. Nor were extinctions confined to large animals:  small animals, plants, and insects disappeared, presumably not all through human consumption. 

因此B可以weaken Krech’s objections to Martin’s theory

望指教！