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【多选题】
下面关于Statement接口中的常用方法，说法正确的是（ ）A.
addBatch(String sql)：将给定的SQL命令添加到此语句对象的当前命令列表
B.
executeQuery(String sql)：执行给定的SQL语句，返回一个ResultSet对象
C.
getUpdateCount()：检索作为更新计数的当前结果，如果没有结果，则返回0
D.
isClosed()：检索此语句对象是否已关闭。
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