●已知字母"G"的ASCΠ码，在其高位前再加上1位奇偶校验位后的机器码是01000111，则"L"和"M"的8位机器码分别为 (59) 和 (60) 。
(59) A.11001100
B.11001101
C.01001101
D.01001100
(60) A.11001100
B.11001101
C.01001101
D.01001100
●抗病毒是一项经常性的工作，不属于其关键因素的是 (61) 。
(61) A.加强对计算机系统的管理
B.不使用计算机软盘
C.注意病毒入侵的预防措施
D.切断病毒传播的途径
●认证是防止 (62) 攻击的重要技术。下面关于认证技术的说法中错误的是 (63) 。
用户A通过计算机网络向用户B发消息，表示自己同意签订某个合同，随后用户A反悔，不承认自己发过该条消息。为了防止这种情况发生，应采用 (64) 。
(62) A.主动
B.被动
C.黑客
D.偶然
(63) A.账户名/口令认证是最常用的一种认证方式
B.消息认证能够确定接收方收到的消息是否被篡改过
C.身份认证是用来对网络中的实体进行验证的方法
D.数字签名是十六进制的字符串
(64) A.数字签名技术
B.消息认证技术
C.数据加密技术
D.身份认证技术
●我国的《计算机软件保护条例》依据的是我国的 (65) 。
(65) A.专利权法
B.版权法
C.著作权法
D.商标权
●Heterogeneous network environments consist of computer systems from (66) vendors that run (67) operating systems and communication protocols. An organization that (68) its computer resources is usually (69) the task of integrating its heterogeneous systems. Typically, each department or division has defined its own network needs (70) OS, LAN topology, communication protocols, applications, and other components.
(66) A.same
B.similar
C.different
D.difference
(67) A.same
B.similar
C.different
D.difference
(68) A.consolidates
B.consists
C.considerate
D.consoles
(69) A.faced on
B.faced with
D.faced about
D.faced up to
(70) A.in general
B.in any term
C.in set terms
D.in terms of
●The major problem with Email is that it is (71) easy to use that people can become (72) with messages (73) they can possibly answer in a day.In addition，mail boxes require some management to (74) messages or archive those that might be required later.Senders don't always know about your Email backlog and often send (75) messages.
(71) A.too
B.so
C.very
D.much
(72) A.full
B.lost
C.inundated
D.filled
(73) A.more than
B.than
C.that
D.which
(74) A.manage
B.save
C.backup
D.dispose of
(75) A.toomany
B.redundant
C.long
D.trivial
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