●The standard (67) in C language contain many useful functions for input and output，string handling，mathematical computations，and system programming tasks.(67) A．databaseB．filesC．librariesD．subroutine
●The standard (67) in C language contain many useful functions for input and output，string handling，mathematical computations，and system programming tasks.
(67) A．database
B．files
C．libraries
D．subroutine
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