解题方法 by liu https://padlet.com/luloplyj/9fc0pdd7rggs 计算图形面积 en-us 2015-12-18 03:05:35 UTC 2023-03-02 22:37:08 UTC hello@padlet.com https://padlet-assets.storage.googleapis.com/portrait/notebook.jpg 计算阴影面积 1623800992 https://padlet.com/luloplyj/9fc0pdd7rggs/wish/87007428 2015-12-18 05:27:14 UTC https://padlet.com/luloplyj/9fc0pdd7rggs/wish/87007428