The millionaires, ____, are not happy as most of us had thought.

A．honest

B．to be honest

C．honest

D．to be honesty

按电缆结构和绝缘材料种类的不同，橡塑电缆分类如下（）。

A.交联聚乙烯绝缘电缆

B.聚炳乙烯绝缘电缆

C.聚氯乙烯绝缘电缆

D.橡胶绝缘电缆