题目内容：

she thinks there are many people in the world who are smarter than her
she thinks there are many people in the world who are smarter than her.
in the world 可不可以放在句子最后面,为什么放在people 后面,或者是为什么 in the world 后用who

优质解答

介词短语 in the world 和定语从句 who are smarter than her都是修饰宾语从句中的主语 many people 的.由于, 介词短语较短, 为了保持句子平衡,最好把介词短语置于定语从句和先行词之间.这类不紧靠先行词的定语从句语法上叫【分隔定语从句】

再如：
This is the only book on the shelf that you can borrow.
He is the only student in my class who has failed in the exam.

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