请教XDF补充第4篇(2772的63-4)

同意cliffs, 但是不同意crests of waves的解释, 因为从文章中(包括新东方老师讲的)creasts of waves一定是从浪尖上起飞. 不过我觉得MM真的很细心,以前我只是注意了crests of waves 对应water, 今天才发现这个题是两点对应, crests of waves----water, cliffs---cliffs. 再仔细想想,一个 water-cliff 实际上说了suggestions that they launched themselves by jumping from cliffs,  or even by rising into light winds from the crests of waves 2个方面,再正确不过的答案

想请问passage4第一题：

1. It can be inferred from the passage that scientists nowgenerally agree that the
(A) enormous wingspan of the pterosaurs enabledthem to fly great distances
(B) structure of the skeleton of the pterosaurs suggests aclose evolutionary relationship to bats
(C) fossil remains of the pterosaurs reveal how theysolved the problem of powered flight
(D) pterosaurs were reptiles
(E) pterosaurs walked on all fours

我的选c，是对应到第5-8行，答案是d，请问这题该如何解??

 我问一个~那位指教以下~

第5题d为什么不对呀？The anatomy of their wings suggests that they did not evolve into the class of birds. 不正是说明了They were an early stage in the evolution of the birds么？？？

贴个题目，请教第四题

PASSAGE 4
*The fossil remains of the first flying vertebrates, the pterosaurs, have intrigued paleontologists for more than two centuries. How such large creatures, which weighed in some cases as much as a piloted hang-glider
5) and had wingspans from 8 to 12 meters, solved the problems of powered flight, and exactly what these creatures were--reptiles or birds-are among the ques-tions scientists have puzzled over.
* Perhaps the least controversial assertion about the
10) pterosaurs is that they were reptiles. Their skulls,pelvises, and hind feet are reptilian. The anatomy of their wings suggests that they did not evolve into the class of birds. In pterosaurs a greatly elongated fourth finger of each forelimb supported a winglike membrane.
15)
        The other fingers were short and reptilian, with sharpclaws. In birds the second finger is the principal strut of the wing, which consists primarily of feathers. If the pterosaurs walked on all fours, the three short fingers may have been employed for grasping. When a
20) pterosaur walked or remained stationary, the fourth finger, and with it the wing, could only turn upward in an extended inverted V-shape along each side of the animal's body.
* The pterosaurs resembled both birds and bats in
25) their overall structure and proportions. This is not sur- prising because the design of any flying vertebrate is subject to aerodynamic constraints. Both the pterosaursand the birds have hollow bones, a feature that repre-sents a savings in weight. In the birds, however, these
30)
        bones are reinforced more massively by internal struts.
*Although scales typically cover reptiles, the pterosaurs probably had hairy coats. T.H. Huxley rea-soned that flying vertebrates must have been warm-blooded because flying implies a high rate of
35) metabolism, which in turn implies a high internal tem-perature. Huxley speculated that a coat of hair would insulate against loss of body heat and might streamline the body to reduce drag in flight. The recent discoveryof a pterosaur specimen covered in long, dense, and
40) relatively thick hairlike fossil material was the first clearevidence that his reasoning was correct.
*Efforts to explain how the pterosaurs became air-borne have led to suggestions that they launched them-selves by jumping from cliffs, by dropping from trees.
45) or even by rising into light winds from the crests of waves. Each hypothesis has its difficulties. The first wrongly assumes that the pterosaurs' hind feet rese-mbled a bat's and could serve as hooks by which the animal could hang in preparation for flight. The second
50) hypothesis seems unlikely because large pterosaurs could not have landed in trees without damaging their wings. The third calls for high waves to channelupdrafts. The wind that made such waves however,might have been too strong for the pterosaurs to
55) control their flight once airborne.

4. The ideas attributed to T.H. Huxley in the passagesuggest that he would most likely agree with whichof the following statements?
(A) An animal's brain size has little bearing on itsability to master complex behaviors.
(B) An animal's appearance is often influenced byenvironmental requirements and physicalcapabilities.
        
(C) Animals within a given family group are unlikelyto change their appearance dramatically over aperiod of time.
(D) The origin of flight in vertebrates was anaccidental development rather than the outcomeof specialization or adaptation.
(E) The pterosaurs should be classified as birds, notreptiles. （B）

虽然知道定位点，但是不知道怎么推论出B的？

另外，E为什么不行阿？

拜托指点一下~~~ 谢谢喔

希望有点用呵

谢谢MM。

你这么说很有道理，我可以理解了!