https://padlet.com/parakim31/7dz14w3ynf7b2cq5 가상탐구로 탐구기본 배워보기 en-us 2021-05-09 16:50:24 UTC 2021-05-10 03:15:59 UTC hello@padlet.com https://padlet.net/icons/png/1f52c.png https://padlet.com/parakim31/7dz14w3ynf7b2cq5/wish/1507584647 왜 종이가 떨어지지 않을가?]]> 2021-05-10 03:14:26 UTC https://padlet.com/parakim31/7dz14w3ynf7b2cq5/wish/1507584647 https://padlet.com/parakim31/7dz14w3ynf7b2cq5/wish/1507587637 공기가 통하지 않아서 종이가 않떠러 질것ㅇ다.,]]> 2021-05-10 03:15:59 UTC https://padlet.com/parakim31/7dz14w3ynf7b2cq5/wish/1507587637