But at one point in the day, Britain leapfrogged overnight leader China, before the host nation returned to the top mostly because of the super performance of their table tennis players.

• 知识测验：根据学生的年级，可以对每一科的主要知识点进行检测，通过在线答题，提交并打分的形式，通过结果可以反映学生目前知识点掌握情况。