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问题 选择题

小明驾驶小车沿赤道行驶，若一天走80里，多少天才走完               （     ）

A．100天

B．1000天

C．800天

D．8000天

答案

答案：B

题目分析：地球赤道周长约4万千米，1千米=1公里，即4万公里，若一天走80里，需要1000天才能走完。

单项选择题

计算机硬件能直接识别并执行的语言是( )。

A．高级语言

B．算法语言

C．机器语言

D．符号语言
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单项选择题

The presentation layer is concerned with the (1) and semantics of the information exchanged between two systems. The processes in two systems are usually exchanging information in the form of character(2), numbers, and so on. The information should be changed to bit (3) before being transmitted. Because different computers use different encoding systems, the presentation layer is responsible for(4) 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(5)-dependent format.

空白（5）处应选择（）

A.receiver

B.user

C.server

D.customer
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