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Keywords: blackboard slide background image, chalk hand-drawn PowerPoint chart Daquan, dynamic science experiment, chemical experiment PPT template, .PPTX format;
This is a group of three rounds around the 3d stereo pentagram compo...
Six rounds of three-dimensional parallel relationship between the ci...
An elegant level of the relationship between the steps of the PPT ch...
The PPT flow chart consists of two slides, a blue PPT flow chart + a...
This is a blue background, orange petal shape, parallel relationship...
This is a set of progressive relationships, PPT chart template, comp...