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This is a PPT background picture of the desk in front of the blackboard;
Keywords: black and white, lecture table, apple, chalk, textbook slide background image
This is a set of orange polygon backgrounds, a summary of the year-e...
This is a set of blue solid polygon backgrounds, and the annual work...
This is a set of vintage hand-painted art flower PPT templates, a to...
This is a set of flowers and birds illustration background, a childr...
This is a set of purple personality style, personal debriefing repor...
This is a set of blue elegant and simple style, work plan PPT templa...