lì / shǐ / kè / shàng / lǎo / shī / jiè / shào / le / Wū / lán / fū / de / shēng / píng / hé / gòng / xiàn历史课上,老师介绍了乌兰夫的生平和贡献。In history class, the teacher introduced Ulanhu's life and contributions.