similar to that of the man这里的that指的什么?The masked man,whose voice is similar to that of the man who appeared to carry out the beheading of James Foley,then describes the act he is about to commit as retribution for the US air strikes.

similar to that of the man这里的that指的什么?The masked man,whose voice is similar to that of the man who appeared to carry out the beheading of James Foley,then describes the act he is about to commit as retribution for the US air strikes.
similar to that of the man这里的that指的什么?
The masked man,whose voice is similar to that of the man who appeared to carry out the beheading of James Foley,then describes the act he is about to commit as retribution for the US air strikes.

similar to that of the man这里的that指的什么?The masked man,whose voice is similar to that of the man who appeared to carry out the beheading of James Foley,then describes the act he is about to commit as retribution for the US air strikes.
代词 that 常用来指代前面提到过的名词以避免用词重复,whose voice issimilar to that of the man 中,前面提到了 voice,为了避免重复,similarto (the voice) of the man 就用 similar to (that) of the man 替代了.


另如


(The weather) of Beijing in winter is much colder than (that) of Shanghai.【指代前面的 the weather】
They said (you particularly wanted to talk to me).Why was (that)?  【指代前面的 you particularly wanted to talk to me】 

这里的that指代的是“voice”

similar to that of the man这里的that指的是voice“声音”