题目
A computer must include three of following.Which one is not necessary?
A、input system
B、output system
C、processing system
D、networking system
第1题
There must be something wrong with my computer, _____ there?
A needn't
B mustn't
C isn't
第2题
A.A
B.B
C.C
D.D
第3题
Whenever new information is entered, it must be stored somewhere in the computer's(70). RAM only(71)the data temporarily. That is, all information stored in the RAM will disappear if you switch the computer off.
A.processor
B.keyboard
C.printer
D.memory
第4题
This is very important. You_____ remember to shut down your computer every evening.
A. ought
B. must
C. can
第5题
A. can
B. will
C. may
D. must
第6题
There must be something wrong with my computer,()there?
A. mustn't
B. needn't
C. isn't
第7题
A.server
B.client
C.host
D.self
第8题
A.parity
B.check
C.test
D.compare
第9题
You ______ all those calculations! We have a computer to do that sort of thing.
A) needn't have done B) must not have done
C) should not have done D) can not have done
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