谢谢大家,帮解答一下句子

maxthon

多谢了啊。

maxthon

但答案给的是it 指代的是research

fenglingchao

我认为it是based on的宾语

A key point in his research and in the hypothesis that he developed based on it
        was that it was not actual numerical birth position that affected personality.

maxthon

等啊等

maxthon

出自longman minitest2 reading

A key point in his research and in the hypothesis that he developed based on it was that it was not actual numerical birth position that affected personality.

划线的部分是强调句式吗，那么it指代的是什么呢？为什么？

谢谢！