{"type":"rich","version":"1.0","title":"艺术层次：前景、中景、背景","description":"理解和识别艺术作品中的前景、中景、背景和地平线。","author_name":"Padlet Arcade","thumbnail_url":"https://arcade.padlet.com/open-graph/social-preview-image.png?timestamp=1781044973110&hashid=YkK4VRNVjl","html":"<iframe src=\"https://arcade.padlet.com/embed/YkK4VRNVjl\" width=\"720\" height=\"480\" frameborder=\"0\" allowfullscreen></iframe>","width":720,"height":480,"provider_name":"Padlet Arcade","provider_url":"https://arcade.padlet.com"}