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【单选题】

The main role of some dinosaurs' developed primitive feathers is to_____.
A．fly

B．fight
C．keep warm
D．frighten the enemy
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根据网考网移动考试中心的统计，该试题：

4%的考友选择了A选项

2%的考友选择了B选项

77%的考友选择了C选项

17%的考友选择了D选项

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