Those who suspect they were warm-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 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 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 vessels.
This question remains(60) unanswered。既然都unanswered了，可以得出这个问题并没有resolve，根据这一点我一看到e就直接排除了。再者，文中问的是主旨题，并提到了很多科学家的名字，所以我一看到选项中有人名的选项就直接排除了，因为它是细节，而题目只问的是主旨题，个人薄见，欢迎指正
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发表于 2007-7-16 22:17:00
