解放军文职考试：特殊结构 　　“名词/代词+of+which / whom”

It now has 20，000 hectares of land，more than two-thirds of which are under cultivation.

　　现在它拥有两万公顷土地，其中三分之二之多已经耕种。

　　Light is the fast thing in the world, the speed of which is 300000 kilometer per second.

　　光是世界上最快的东西，它的速度是每秒30万千米。

　　There are 30 chairs in the small hall, most of which are new.

　　大厅里有三十把椅子，绝大部分是新的。

　　The textile mill has over 8，000 workers and staff，eighty per cent of whom are women.

　　这家纺织厂有8千多职工，女职工占百分之八十。