（多选题）
Which three statements are true regarding the data types in Oracle Database 10g/11g?（）
AOnly one LONG column can be used per table
BA TIMESTAMP data type column stores only time values with fractional seconds
CThe BLOB data type column is used to store binary data in an operating system file
DThe minimum column width that can be specified for a VARCHAR2 data type column is one
EThe value for a CHAR data type column is blank-padded to the maximum defined column width
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略
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