单选题 The expression "first priority" is generally considered to be a case of______.
【正确答案】 B
【答案解析】解析：In the phrase "first priority", "first" means "coming before all the others in time, order, or importance, etc. " , while "priority" also means "being more than others" , so it is a kind of tautology, which means using the same word or its synonyms to define a word.(考查赘语)