下列有关设置PowerPoint22010演示文稿动画效果的叙述中,正确的是
A.通过调整“持续时间”,可以让动画经过一定时间后才出现
B.通过调整“延迟时间”,可以改变动画出现的快慢
C.已经设置好的动画效果不能被删除
D.幻灯片中的同一个对象,可以设置多种动画效果
正确答案是D
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