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【单选题】
(8-2)对于被private访问权限控制符修饰的成员变量,以下说法正确的是( )。A.
可以被三种类所引用：该类自身、与它在同一个包中的其他类、在其他包中的该类的子类
B.
可以被两种类访问和引用：该类本身、该类的所有子类
C.
只能被该类自身所访问
D.
只能被同一个包中的类访问
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【单选题】可以实现定义触发器操作的SQL语是
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B.
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D.
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A.
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B.
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