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2007年1月11日,全国化学优质课比赛在哈尔滨市举行。会场里,一位青年教师正热情洋溢地作《化肥》说课,说课生动形象,乡土气
January 11, 2007, the national chemical quality class competition held in Harbin. In the meeting place, a young teacher was enthusiastically making a talk about “chemical fertilizers”