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【单选题】
在 PowerPoint 2010 中,在当前幻灯片中添加动作按钮是为了()。
A.
增加幻灯片文稿中内部幻灯片换的功能
B.
让幻灯片中出现真正的动画
C.
设置交换式的幻灯片,使得观众可以控制幻灯片的放映
D.
让演示所有幻灯片有一个统一的外观
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