【正确答案】：
A NOUN FULLY CONVERTED FROM AN ADJECTIVE HAS ALL THE CHARACTERISTICS OF NOUNS. IT CAN TAKE AN INDEFINITE ARTICLE OR –(E)S TO INDICATE SINGULAR OR PLURAL NUMBER. THEY CAN BE COMMON ADJECTIVES,FOR EXAMPLE VALUABLES. NOUNS PARTIALLY CONVERTED FROM ADJECTIVES DO NOT POSSESS ALL THE QUALITIES A NOUN DOES. THEY MUST BE USED TOGETHER WITH DEFINITE ARTICLES. WHAT’S MORE, THEY RETAIN SOME OF THE ADJECTIVE FEATURES, FOR EXAMPLE, THE YOUNG.
【题目解析】：A noun fully converted from an adjective has all the characteristics of nouns. It can take an indefinite article or –(e)s to indicate singular or plural number. They can be common adjectives,for example valuables. Nouns partially converted from adjectives do not possess all the qualities a noun does. They must be used together with definite articles. What’s more, they retain some of the adjective features, for example, the young.一个从形容词完全转换过来的名词拥有名词的全部特征。它可以带一个不定冠词或者（e）s用来表示单数和复数。也可以是普通的形容词：如valuables（贵重物品）。从形容词部分转化过来的名词不拥有一个名词全部的特征。它们必须和定冠词一起使用。另外它们还保留了一些形容词特征，例如：“the young（年轻人）”