點解一有重大的災難就要下半旗致哀?
點解致哀要下半旗?
點解一定係下半旗?
收錄日期: 2021-04-30 22:22:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071201000051KK03920