The immediate causes,” Mao explained, “are the severe new demands of Japan, capitulation to which must enormously handicap any attempts at resistance in the future, and the popular response to this deepening threat of Japanese invasion in the form of a great people’s patriotic movement.



请教专家老师们，这里先行词which是做介词to的宾语吗？介词短语to which 是不是做定语从句主语capitulation的定语？若是的话只见过of which有这种使用方法，to which也能这么用吗？

定语从句中，关系代词做介词宾语，介词短语作定语修饰定语从句的主语，这种结构最容易见到的介词为of, 但绝不限于of。理论上任何介词都可以这么用，只须符合逻辑即可。比如：

... electrically-powered cars，the demand for which has increased.

...the students, the design by whom has been approved.

...the woman, the sepation from whom saddened him.

等等。