单选题
元组比较操作(a
1
,a
2
)≥(b
1
,b
2
)的意义是_____。
A、
(a
1
>b
1
) OR ((a
1
=b
1
) AND (a
2
≥b
2
))
B、
(a
1
≥b
1
) OR ((a
1
=b
1
) AND (a
2
≥b
2
))
C、
(a
1
>b
1
) OR ((a
1
=b
1
) AND (a
2
>b
2
))
D、
(a
1
≥b
1
) OR ((a
1
=b
1
) AND (a
2
>b
2
)
【正确答案】
A
【答案解析】
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