Why were posters such an effective way to communicate ?

为什么海报是一种如此有效的交流方式？

Posters commemorating mao 's death are scarce .

纪念毛逝世的宣传画甚为稀少。

Bright posters decorate the streets .

鲜艳的广告招贴画点缀着街道。

A huge firework display was planned and the city 's main street was lined with posters thanking britain and america for their support .

计划中将举行盛大的焰火表演，在城市的主要街道上都悬挂了标语，感激英国和美国对他们的支持。

You took these posters down ?

你把那些宣传单都撕了？