HK 智慧型循線競賽 (中學組)

http://www.stgss.edu.hk/wp-content/themes/osmosis/images/empty/thumbnail.jpg 150 150 STGSS STGSS http://www.stgss.edu.hk/wp-content/themes/osmosis/images/empty/thumbnail.jpg 14th December 2018 14th December 2018