In the context of corporate governance, explain and distinguish between:

(a) (i) the chairman of a company’s board of directors; and (3 marks)(ii) a company’s managing director/chief executive. (2 marks)

节能产品政府采购清单定期在（）等媒体上向社会公布。

A、中国政府采购网

B、中国招标与采购网

C、中国节能节水认证网

D、发展改革委门户网