四川省成都市金堂县又新镇九年级英语全册Unit6Whenwasitinvented2导学案无答案新版人教新目标版通用

Unit 6 When was it inventedPeriod 2 Section A(2a-2d)要点 ：词汇，能够熟练运用句型Who was it/were they invented by?