one of +名词后接定语从句,先行词是这个名词还是one of

问题描述:

one of +名词后接定语从句,先行词是这个名词还是one of
1.This is one of the most interesting questions( that have been asked).
2.The only one of the actors (who knows the line well )is not here.从这两句结构相似的例句看来,第一句的先行词是questions,第二句的先行词是the only one,为什么?

He is one of the students who win the prize.
He is the one of the students who wins the prize.
看到了吗?one of + 名词,后面先行词是指这个名词,
但是
如果one前面有the,the only 之类的,就是指再前面的了