GWD27-Q 3 to Q6:

sallyruru

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Q 5: Which of the following is included in the discussion of the cursorial hypothesis but not in the discussion of the arboreal hypothesis?

A.      A discussion of some of the features of Archaeopteryx

B.      A description of the environment known to have been inhabited by bird ancestors

C.      A possible reason why bird ancestors might have been engaging in activities that eventually evolved into flight

D.      A description of the obvious features of animals with gliding ability

E.       An estimate of the amount of time it took for bird ancestors to evolve the kind of flapping flight that allowed them to become completely airborne

答案是C，为什么呢？

-- by 会员 librahjx (2009/3/1 21:30:00)

再顶一下这个贴，still confuse~为什么选C，文章有定位点吗？

mandychen1108

The “cursorial”(running) hypothesis holds that small dinosaurs ran along the ground and stretched out their arms for balance as they leaped into the air after insect prey or, perhaps, to avoid predators.
个人觉得所说的原因就是insect prey or avoid predators.不知道对不对，因为开始我也选做错了...
待指正...

messer

支持C啊  做题的时候就知道这两个条件都在文章中，但是我考虑了题目The passage presents which of the following facts as evidence that tends to undermine the arboreal hypothesis?
中的小动物是明显的evidence  但是原文中只说树大，没有说树小来作为evidence  
所以个人认为D选项中 1 树小没有直接present 2 树小也不是直接的evidence  这样的讲法像玩文字游戏啊

zhxm3414

第六题为什么选B啊？文中并没有比较啊？求NN解答！

camelo777

第六题问的什么？把题目贴出来方便大家回答你~

louishirley

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Q 5: Which of the following is included in the discussion of the cursorial hypothesis but not in the discussion of the arboreal hypothesis?

A.      A discussion of some of the features of Archaeopteryx

B.      A description of the environment known to have been inhabited by bird ancestors

C.      A possible reason why bird ancestors might have been engaging in activities that eventually evolved into flight

D.      A description of the obvious features of animals with gliding ability

E.       An estimate of the amount of time it took for bird ancestors to evolve the kind of flapping flight that allowed them to become completely airborne

答案是C，为什么呢？

-- by 会员 librahjx (2009/3/1 21:30:00)

我做这题的时候用的是排除法。


A选项 Archaeopteryx这家伙在第一段A假设中出现，第二段中没有提到，干掉；
B选项bird ancestor inhabit的environment也出现在第一段A假设中，第四题时已经定位到了，这题直接干掉；
C选项但是看的时候只是不确定，暂时不看；
D选项gliding ability只出现在第一段A假设中，干掉；
E选项两段都没有提到完全能扑腾翅膀飞要花的time，干掉。


答案只有C。 = =|||




做完题目回头思考的时候，觉得C假设提到了run这个行为。从开头   The “cursorial”(running) hypothesis holdsthat small dinosaurs ran along the ground and stretched out their arms for balanceas they leaped into the air after insect prey or, perhaps, to avoid predators.......
讲了为什么要run，还分析了有足够的能力high speed。run不就是一种activity么，而且有助于flight。


个人愚见。请走过路过的NN指点。

louishirley

第六题为什么选B啊？文中并没有比较啊？求NN解答！

-- by 会员 zhxm3414 (2011/6/19 0:33:08)

不是NN。交流一下自己的解题思路。

Q 6: The passage suggestswhich of the following regarding the climbing ability of Archaeopteryx?

A.    Itsability to climb trees was likely hindered by the presence of incipientfeathers on its forelimbs.

A 错误，文章定位：The“arboreal” hypothesis holds that bird ancestors began to fly by climbing treesand gliding down from branches with the help of the incipient feathers。

B.     Itwas probably better at climbing trees than were its maniraptoran dinosaurcousins.

B 错误，文章定位 Archaeopteryx(the earliest known bird) and its maniraptoran dinosaur cousins have noobviously arboreal adaptations, such as feet fully adapted for perching.Perhaps some of them could climb trees...

C.    Ithad certain physical adaptations that suggest it was skilled at climbing trees.

C 错误，文章定位同上

D.    Scientistshave recently discovered fossil evidence suggesting it could not climb trees.

D.错误，文章定位：andthere were no plants taller than a few meters in the environments where Archaeopteryxfossils have been found. 最近发现的fossils只说明environment问题。综合上面两选项的定位，是否会climb没有定论。

E.     Scientistsare uncertain whether it was capable of climbing trees

E. correct,文章定位：butno convincing analysis has demonstrated how Archaeopteryx would have bothclimbed and flown with its forelimbs.....Evenif the animals could climb trees,,,, 有没有capability climb木有定论。