选择题：15.设置主控索引命令（ ）(本题2.0分)A. SET DELETE ON/OFFB. SET D

题目内容：
15.设置主控索引命令（ ）(本题2.0分)
A. SET DELETE ON/OFF
B. SET DEFAULT TO
C. SET TALK ON/OFF
D. SET ORDER TO
参考答案：