In 300 A.D.Chinese children played with a fan-like toy that span upwards and fel

游客2025-03-18 44

问题 In 300 A.D.Chinese children played with a fan-like toy that span upwards and fell back to earth as______ceased.

选项 A、emission
B、motivation
C、rotation
D、suspension

答案 C

解析 rotation“旋转”；emission“释放出(光、热、气)”；motivation“动机，意图”；suspension“悬浮，悬念，悬挂”。题句意为：公元300年时，中国的孩子玩一种像扇子一样的玩具，这种玩具旋转上升，旋转停止时就落回到地面。

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