____around the Water Cube, we were then taken to see the Birds’ Nest for the 2008 Olympic Games.

A．Having shown

B．To be shown

C．Having been shown

D．To show

卫生篇章审查要点

A．职业危害因素或其他卫生问题分析恰当

B．编写内容齐全

C．卫生防护措施可行，预期效果真实可信

D．卫生防护投入概算有落实

E．以上都是