题目
●The presentation layer is concerned with the _(71) and semantics of the informationexchanged between two systems. The processes in two systems are usually exchanginginformation in the form. of character (72)-,numbers, and so on. The information should be changed to bit (73) before .being transmitted. Because different computers use different encoding systems, the presentation layer is responsible for (74) between these different encoding methods. The presentation layer at the sender changes the information from its sender-dependent format into a common format. The presentation layer at the receiving machine changes the common format into its (75) dependent format.
(71)A.frequency B.syntax C.dialog D.format
(72)A.numbers B.functions C.strings D. codes
(73)A.systems B.characters C.layers D. streams
(74)A.capability B.interoperability C.reliability D.dependability
(75)A.receiver B.user C.server D. customer
第3题
第4题
B.purpose of the presentation
C.length of the presentation
D.organization of the presentation
E.history of the presentation
第8题
A、You must be working very hard on the presentation
B、You must have worked very hard on this presentation
C、Your presentation is very hard working
D、You work very hard on this presentation
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