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(yǔ)做主語(yǔ)，謂語(yǔ)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