one of的幾種用法：

　　1、one of +代詞賓格或名詞復(fù)數(shù)。

　　如：one of them.

　　one of the students.

　　2、one of 短語做主語，謂語動(dòng)詞用單數(shù)。

　　One of them is good at math.

　　3.one of +the+形容詞最高級(jí)+名詞復(fù)數(shù)。

　　one of the longest rivers.