（522）The NLS_LANGUAGE parameter specifies the default conventions to be used for which of the following globalization elements?

A. Languages for server messages

B. Day and month names and abbreviations

C. Symbols to represent a.m.,p.m.,AD,and BC

D. Affirmative and negative response strings(YES,NO)

E. None of the above

F. All of the above

答案：（F）

解析：

NLS_LANGUAGE指定了数据库的默认语言. 这个语言用于消息、Day和Month的名称、AD/BC符号、am/pm符号、默认的排序机制。

这个参数还决定NLS_DATE_LANGUAGE和NLS_SORT参数的默认值。