2016-2017学年 人教版 必修2 unit1 Cultural relics using language 课件 (1)
2016-2017学年 人教版 必修2 unit1 Cultural relics  using language 课件 (1)第3页

A fact is anything that can be proved.

An opinion is what someone believes is true but has not been proved.

An evidence is true information which must be facts rather than opinions.