题目内容

High-level languages must first be translated into a machine language before they can be understood and processed by a computer. This job is often done by ( ).

A. an assembler
B. a loader
C. a linker
D. a compiler

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( ) is the basic software that controls a computer.

An operating system
B. A word-processing program
C. An application program
D. An assembler

The most widely used OS in the world is ( ) which provides users with a graphical user interface.

A. Windows OS
B. UNIX
C. MS-DOS
D. OS/2

A (An) ( ) is a low-level language in binary code that the computer can understand and execute directly.

A. assembly language
B. object-oriented language
C. machine language
D. high-level language

A ( ) is a set of rules that controls the interaction of different devices in a network or internetwork.

A. model
B. protocol
C. dialog
D. query