皮皮学，免费搜题
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搜题
【单选题】
下面哪种方法可以为一段影片实现不同片断的复杂变速?A.
伸展
B.
持续
C.
启用时间重映射
D.
内部/外部
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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