one of的幾種用法：

　　1、one of +代詞賓格或名詞復數

　　如：one of them

　　one of the students

　　2、one of 短語做主語，謂語動詞用單數

　　One of them is good at math.

　　3、one of +the+形容詞最高級+名詞復數

　　one of the longest rivers