灯亮or灯灭

Title:
灯亮or灯灭
Description:

脑筋急转弯: 灯亮or灯灭
Brain Teaser: Light Bulb Switching Brain Teaser

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Duration:
11:26
Alex Mou added a video: 灯亮or灯灭
Format: Youtube Primary Оригинал Synced

This video is part of Amara Public.