Networks of blood vessels in bat's wings serve only to disperse heat generated in flight. This heat is generated only because bats flap their wings. Thus paleontogists' recent discovery that the winged dinosaur Sandactylus had similar networks of blood vessels in the skin of its wings provides evidence for the hypothesis that Sandactylus flew by flapping its wings, not just by gliding. 89. The argument in the passage relies on which if the following assumptions? (A) Sandactylus would not have had networks of blood vessels in the skin of its wings if these networks were of no use to Sandactylus. (B) All creatures that fly by flapping their wings have networks of blood vessels in the skin of their wings. (C) Winged dinosaurs that flapped their wings in flight would have been able to fly more effectively than winged dinosaurs that could only glide. (D) If Sandactylus flew by flapping its wings, then paleontologists would certainly be able to find some evidence that it did so. (E) Heat generated by Sandactylus in flapping its wings in flight could not have been dispersed by anything other than the blood vessels in its wings. Answer: A 我能够把B, C, D去掉, 然後在A 和 E选项间抉择 我选E 也上伤咖和CD上爬文过了 也看了後面OG的解释 我还是搞不懂为什麽答案是A?! (头脑快打结了 >///<) 谢谢各位的贤人指教~ -- 音乐史, 我永远恨你.. (╯‵□′)╯︵ ┴─┴ --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 68.122.28.38