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

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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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