When was it invented?( Period 1)Unit9 【最新】九年级英语 Unit9第一课 时课件 人教新目标版 课件 What do you think a computer is used for? A computer is used for surfing the Internet. beusedfor+(doing)sth. 被用来 【最新】九年级英语 Unit9第一课 时课件 人教新目标版 课件 computers watchmovies sendemails surftheInternet chatwithfriends lookupinformation - They are used for sending emails / - What are computers used for? playcomputer games 【最新】九年级英语 Unit9第一课 时课件 人教新目标版 课件 The history of computer development When was it invented? Thecalculatorwasinvent
