Traditional Culture Encyclopedia - Traditional culture - Insert a 30-minute countdown timer into the ppt of the knowledge contest, and there will be a sound prompt in the last few seconds.
Insert a 30-minute countdown timer into the ppt of the knowledge contest, and there will be a sound prompt in the last few seconds.
There are many ways:
1. Search for a countdown timer (. Swf) and insert it into the motherboard view of ppt, so that each slide has a countdown timer.
2. Search the ppt template with countdown on the Internet.
3. Search for an independent countdown timer on the Internet and use it with ppt.
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