简单讲,关键词就是用于表达文章、文献和材料的主题内容的词语。对历史学科来讲,关键词,就是教材的文字和图表、情景材料和问题任务中表示时间、地点、人物、事件、特征、结果和要求的词语。例如,“他认为,从欧洲出发,一直向西航行,就能到达东方各国。于是1492年5月3日,他从西班牙出发,横渡大西洋,开始了探险航行,先后到达了巴哈马群岛、古巴、海地等地。每到一个地方,他就宣布那里是西班牙王室的领 In simple terms, a keyword is a term used to express the subject matter of articles, documents, and materials. For historical subjects, the key words are texts and diagrams of textbooks, contextual materials and words of time, place, person, event, character, result, and requirement in the task of the question. For example, ”He believed that starting from Europe and continuing to sail west, he could reach the eastern countries, so on May 3, 1492, he set out from Spain and crossed the Atlantic to begin an adventure voyage that reached the Bahamas and Cuba , Haiti, etc. Everywhere he announces that he is the leader of the Spanish royal family