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  3. The theory that the impact of a giant meteorite caused the extinction of the dinosaurs is based on evidence that a cloud of dust

The theory that the impact of a giant meteorite caused the extinction of the dinosaurs is based on evidence that a cloud of dust

admin2014-10-21  64
问题 The theory that the impact of a giant meteorite caused the extinction of the dinosaurs is based on evidence that a cloud of dust from the impact blocked off sunlight around the globe for months, reducing temperatures and destroying the dinosaurs’ food supply. Which of the following, if true, casts the most serious doubt on the theory above?
选项 A、Dinosaurs are believed to have been cold-blooded and thus very sensitive to any temperature change.
B、Some dinosaurs lived in regions where their food supply was not well adapted for long periods of cold and darkness.
C、Many large animals that existed during the time of the dinosaurs and shared a common food supply with them continued to populate the Earth long after the extinction of the dinosaurs.
D、A large volcanic explosion that strewed dust in the air and blocked out sunlight was the cause of death of animals within hundreds of miles of the eruption.
E、Many of the largest dinosaurs were herbivorous relying exclusively on vegetation for their dietary needs.
答案C
解析
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