单项选择题
A. V$VALID_NLS_VALUES
B. NLS_VALID_VALUES
C. NLS_VALUE_OPTIONS
D. V$NLS_VALUE_OPTIONS
E. V$NLS_VALID_VALUES
多项选择题 The NLS_SORT parameter sets the default sort method for which of the following operations?（）
多项选择题 Given two different character sets (A and B), which of the following must be true for A to be considered a strict superset of B?（）
多项选择题 What elements of globalization can be explicitly defined using the NLS_LANG environment variable?（）