单项选择题

The development process in the software （） involves four phases:analysis,design,implementation,and testing.

A．maintenance
B．lifecycle
C．programming
D．upgrading

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（）is a query language for manipulating data in a relational database.

A．Assemble
B．SQL
C．C++
D．Fortran

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（）is a file that contains metadata-that is,data about data.

A．document
B．Excel table
C．database
D．data dictionary

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