单项选择题

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

A．top-down
B．structure
C．data-driven
D．event-driven

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单项选择题

The standard（）in C language contain many useful functions for input and output ， string handing，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

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