A.Communications
B.Word Processing
C.Database Management
D.Electronic Spreadsheets
第1题
A backup program ( ).
A、makes a copy of files you select
B、returns you to the previous program
C、undoes the last change you made
D、None of the above
第2题
Windows versions before Windows 95 ( ).
A、are proprietary
B、are not operating system at all
C、rely on DOS as the operating system
D、were the first successful graphical operating system
第3题
( ) is software the converts high-level language statements into machine language once at a time, in succession.
A、Compiler
B、Language translator
C、Assembler
D、Interpreter
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