과학 by 성영제 https://padlet.com/24study73/kvw3dj159g5qfh7v en-us 2024-06-16 13:53:36 UTC 2024-06-16 15:18:38 UTC hello@padlet.com 볼록렌즈 24study73 https://padlet.com/24study73/kvw3dj159g5qfh7v/wish/3029132684 2024-06-16 15:18:38 UTC https://padlet.com/24study73/kvw3dj159g5qfh7v/wish/3029132684 평면유리 24study73 https://padlet.com/24study73/kvw3dj159g5qfh7v/wish/3029132820 2024-06-16 15:19:10 UTC https://padlet.com/24study73/kvw3dj159g5qfh7v/wish/3029132820