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These are two realistic blackboard PPT background pictures;
Keywords: Blackboard slide background picture, black teaching supplies PowerPoint background picture
This is a set of colorful fresh children's education PPT templat...
This is a set of 26 exquisite party building work PPT templates.
This is a set of 22 PPT templates for nurses on a pink gradient back...
This is a set of 22 medical PPT templates with colorful pills and ca...
The meeting to celebrate the 95th anniversary of the founding of the...
This is a set of 22 PPT templates for Bank of Beijing General Work R...