The non-monetary rewards from work also contribute to happiness.
查看答案
The constant material improvement only leads to unnecessary waste and adds little to human happiness.
A. 对
B. 错
PowerPoint 中可以对音频文件进行裁剪。
A. 对
B. 错
PowerPoint中音频不可以跨幻灯片播放。
A. 对
B. 错
PowerPoint中视频的标牌框架只能用视频中的界面
A. 对
B. 错
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