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762 Duckbill dinosaurs, like today's monitor lizards had particularly long tails, which they could whip at considerable speed. Monitor lizards use their tails to strike predators. However, although duckbill tails were otherwise very similar to those of monitor lizards, the duckbill’s tailbones were proportionately much thinner and thus more delicate. Moreover, to ward off their proportionately much larger predators, duckbills would have had to whip their tails considerably faster than monitor lizards do.
The information given, if accurate, provides the strongest support for which of the following hypotheses?
(A) If duckbills whipped their tails faster than monitor lizards do, the duckbills tail would have been effective at warding off the duckbills fiercest predators.
(B) Duckbills used their tails to strike predators, and heir tailbones were frequently damaged from the impact.
(C) Using their tails was not the only means duckbills had for warding off predators.
(D) Duckbills were at much greater risk of being killed by a predator than monitor lizards are.
(E) The tails of duckbills, if used to ward off predators, would have been more likely than the tails of monitor lizards to sustain damage from the impact.
广州申友GMAT老师Cheryl带你分析
CR题型:conclusion
逻辑链:条件推理
比较对象:D&lizards
比较条件:long tails(D的更脆弱)
比较结果:lizard用tails strike predators(D的predator更大)
选项分析:
A. 如果D挥得更快,D可能更能吓退敌人,但D的敌人更大,所以不一定
B. D也用尾巴吓退敌人,原文在强调两者差异,所以不一定
C. Tail不是唯一D用来吓退敌人的方法,新信息未知,排除
D. D比lizard更危险,新信息,排除
E. 如果D用tails吓退敌人的话比lizard更可能受伤,综合以上信息,正确
答案:E
难度:650-680
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