脚手架应由专业脚手架搭设队伍和取得架子工证件设。

The scaffold shall be erected by professional scaffold erect operation certificates.

说一个与讲演主题相关并且富有戏剧性的故事，或者选用从新闻中读到的内容，比如某个架子工因为没有系好安全带而摔死了等。

Telling a dramatic story related to the subject, perhaps something read in the press. E. g. How a Scaffolder fell to death because he didn't tie on.