单选题：Jim Woodman felt sure that __________.

题目分类：理工类
题目类型：单选题
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题目内容：

Jim Woodman felt sure that __________. A．A　the designs could be seen from the air
B．B　the ancient people had learned to fly by accident
C．C　the ancient people were clever and had learned to fly
D．D　Nazca had been designed to help people fly

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