one of the things that fascinates us most about cats is the popular belief ...前一个that 引导定从,可不可以把is the popular that 前的从句叫做主语从句呢?

one of the things that fascinates us most about cats is the popular belief ...前一个that 引导定从,可不可以把is the popular that 前的从句叫做主语从句呢?
one of the things that fascinates us most about cats is the popular belief ...前一个that 引导定从,
可不可以把is the popular that 前的从句叫做主语从句呢?

one of the things that fascinates us most about cats is the popular belief ...前一个that 引导定从,可不可以把is the popular that 前的从句叫做主语从句呢?
当然不可以,因为它是用来修饰前面的things,而不是is的主语,is的主语仍然是前面的the things.