要修改字体大小。2010201120122013201401%02%03%04%05%ADD YOU TITLE HERESupporters say that the ease of use of presentation software can save a lot of time for people who otherwise would have used other types of visual aid—hand-drawn or mechanically typeset slides, blackboards or whiteboards, or overhead projections. Ease of use also encourages those who otherwise would not have used visual aids, or would not have given a presentation at all, the difference in needs and desires of presenters and audiences has e more noticeable.23,4566,45783,451ADD YOU TITLE HERE0303020201010404请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本ADD YOU TITLE HERE01020304请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本请在此处输入您的文本ADD YOU TITLE HERE
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