如底下影片所示,完成今日之作業
https://weteach.edu.tw/pluginfile.php/105272/mod_page/content/2/%E5%A4%A7%E5%9C%93%E4%B8%8A%E6%BB%BE%E5%8B%95%E7%9A%84%E5%B0%8F%E5%9C%93.mp4