云南开放大学计算机专业英语第一章网上作业

一、单项选择题(共5题,共100分)
第1 题 （20分）：
Somecomputers are designed to_________ their work across several  CPUS in amultiprocessing configuration.
A. distribute
B. distributed
C. distributing
D. distributes
正确答案: A
第2 题 （20分）：
One means by which this is done is with aspecial signal called an _______ which can periodically cause the computer tostop executing instructions where it was and do something else instead
A. pause
B. stop
C. interrupt
D. exit
正确答案: C
第3 题 （20分）：
Hard disk drives , floppy disk drives and_______drives serve as both input and output
A. Opticalmagnetic
B. keyboard
C. mouse
D. optical disc
正确答案: D
第4 题 （20分）：
In almost all modern computers, each memory cellis set up to store binary numbers in groups of_______ (called a byte).
Eachbyte is able to represent 256 different numbers (2^8 = 256); either from 0 to255 or -128 to +127
A. Onebit
B. twobits
C. eightbits
D. eight bit
正确答案: C
第5 题 （20分）：
A generalpurpose computer has four main components: the arithmetic logic unit(ALU),_______, the memory, and the input and output devices (collectivelytermed I/O).
A. thecontrol unit
B. mouse
C. display
D. disc
正确答案: A