In （） programming，the user determines the sequence of instructions to be executed，not the programmer.

单项选择题The standard （） in C language contain many useful functions for input and output， string handling，mathematical computations，and system programming tasks.

A．database
B．files
C．libraries
D．subroutine

单项选择题In C language，functions are important because they provide a way to （） code so that a large complex program can be written by combining many smaller parts.

A．modify
B．modularize
C．block
D．board