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 高等教育 / 数据库原理及应用(管理类)

若对于实体集A中的每一个实体，实体集B中有1个实体（n≥0）与之联系，而对于实体集B中的每一个实体，实体集A中只有1个实体与之联系，则实体集A和实体集B之间的联系类型为（）。

A、1：1
B、1：N
C、M：N
D、N：1
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数据库原理及应用(管理类)
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