【名词&注释】
智能卡(smart card)、子网掩码(subnet mask)、区位码(area position code)、字符集(character set)、国家标准。、每一个(every single)
[单选题]Both bus and tree topologies are characterized by the use of multipoint().
A. medium
B. connection
C. token
D. resource
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举一反三：
[单选题]
B． 1303H
C． B3A3 H
D． 1903H
A. 3323HB． 1303H
B. B3A3 H
C. 1903H
[单选题]在计算机网络中，某IP地址的前24位为网络号，后8位为主机号，对应的子网掩码为(40)，它属于(41)地址的默认子网掩码。
A. 255.0.0.0
B. 255.255.0.0
C. 255.255.255.192
D. 255.255.255.0
[单选题]A(71)is a data type whose major attributes are determined by the roles governing the insertion and deletion of its elements. The only element that can be deleted or removed is the one that was inserted most(72). Such a structure is said to have a last-in/first-out(LIFO)behavior, or protocol.
A. stack
B. queues
C. pointer
D. record
[单选题]● （30） 记录的数据在物理上不可改写。
A. 磁卡
B. 光卡
C. 智能卡
D. 逻辑加密卡
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