GMAT考试资料：GWD试题合集（二十三）.

　　以下将为正在备战GMAT考试的同学们整理一些经典的GMAT阅读试题，并分多个合集推出，希望能够为正在备考GMAT考试的考生提供或多或少的帮助。

　　12. GWD-9-Q33 -Q36恐龙骨化石能够证明恐龙是温血动物么

　　Scientists studying the physiology

　　of dinosaurs have long debated whether

　　dinosaurs were warm- or cold-blooded.

　　Line Those who suspect they were warm-

　　(5) blooded point out that dinosaur bone

　　is generally fibro-lamellar in nature;

　　because fibro-lamellar bone is formed

　　quickly, the bone fibrils, or filaments, are

　　laid down haphazardly. Consistent with

　　(10) their rapid growth rate, warm-blooded

　　animals, such as birds and mammals,

　　tend to produce fibro-lamellar bone,

　　whereas reptiles, which are slow growing

　　and cold-blooded, generally

　　(15) produce bone in which fibrils are laid

　　down parallel to each other. Moreover,

　　like the bone of birds and mammals,

　　dinosaur bone tends to be highly

　　vascularized, or filled with blood

　　(20) vessels. These characteristics,

　　first recognized in the 1930’s,

　　were documented in the 1960’s by

　　de Ricqlès, who found highly vascularized,

　　fibro-lamellar bone in several

　　(25) groups of dinosaurs. In the 1970’s,

　　Bakker cited these characteristics as

　　evidence for the warm-bloodedness of

　　dinosaurs. Although de Ricqlès urged

　　caution, arguing for an intermediate type

　　(30) of dinosaur physiology, a generation of

　　paleontologists has come to believe

　　that dinosaur bone is mammalianlike.

　　In the 1980’s, however, Bakker’s

　　contention began to be questioned, as a

　　(35) number of scientists found growth rings

　　in the bones of various dinosaurs that

　　are much like those in modern reptiles.

　　Bone growth in reptiles is periodic in

　　nature, producing a series of concentric

　　(40) rings in the bone, not unlike the growth

　　rings of a tree. Recently, Chinsamy

　　investigated the bones of two dinosaurs

　　from the early Jurassic period

　　(208-187 million years ago), and found

　　(45) that these bones also had growth rings;

　　however, they were also partially fibrolamellar

　　in nature. Chinsamy’s work

　　raises a question central to the debate

　　over dinosaur physiology: did dino-

　　(50) saurs form fibro-lamellar bone because

　　of an innately high metabolic rate associated

　　with warm-bloodedness or

　　because of periods of unusually fast

　　growth that occurred under favorable

　　(55) environmental conditions? (Although

　　modern reptiles generally do not form

　　fibro-lamellar bone, juvenile crocodiles

　　raised under optimal environmental

　　conditions do.) This question remains

　　(60) unanswered; indeed, taking all the evidence

　　into account, one cannot make

　　a dinitive statement about dinosaur

　　physiology on the basis of dinosaur

　　bone. It may be that dinosaurs had an

　　(65) intermediate pattern of bone structure

　　because their physiology was neither

　　typically reptilian, mammalian, nor avian.

　　老新观点

　　Long debate whether dinosaur was warm-or cold blooded? Scientists(warm-blooded) pointed out… moreover… these characteristic first recognized… cited as evidence… However, B’s contention began to be questioned…Recently, C investigated, however… C’s work raises a question central to the debate:…..

　　This question remains unanswered……

　　以上就是本期GMAT试题的所有内容，考生可以此为据并进行针对性的练习，逐步掌握GMAT阅读的解题规律及技巧，以达到迅速提高GMAT考试成绩的目的。 相关链接：

1.GMAT考试资料：GWD试题合集（二十二）

2.GMAT考试资料：GWD试题合集（二十一）

3.GMAT考试资料：GWD试题合集（二十）

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