第25题: [单项选择]The report shows that poor families spend a large ______ of their income on food. A. fraction B. sector C. section D. proportion 参考答案:D 答案解析:[分析] 名词词义辨析题。fraction,小部分,片断,分数;sector,部分,部门;section,部分;proportion,比例,部分,a large proportion of大部分。这句