●M软件公司为确保其软件产品在行业中的技术领先地位，保持其在市场竞争中占据优势，对公司职工进行了保密约束，防止技术秘密外泄。该公司某开发人员将其所开发软件的程序设计技巧和算法流程通过论文发表。以下说法正确的是(17)。

(17)

●The term, (74) loop, refers to

• ●The term, (74) loop, refers to a loop that is contained within another loop.    (74)A.program
• B.nested
• C.statement,
• D.Network

●The (75)is designed specific

• ●The (75)is designed specifically as a security system for preventing unauthorized communications between one computer network and another computer network.    (75)A.firewall
• B.protocol
• C.hacker
• D.virus

●

• ●A (73) is a named memory block. By using its name, we can refer to the data stored in the memory block.    (73)A.word
• B.record
• C.program
• D.variable

The(71)is

• The(71)is a combination of keys that allows the user to activate a program function without clicking a series of menus options.    (71)A.shortcut-key
• B.quick-key
• C.fast-key
• D.rapid-key

●In computer science ,

• ●In computer science ,a data (72) is a way of storing data in acomputer so that it can be used efficiently.    (72)A.record
• B.file
• C.structure
• D.pool

●

• ●ARP协议属于(69)层，其作用是(70)。    (69)A．传输层
• B．网络层
• C．会话层
• D．应用层    (70)A．由MAC地址求lP地址
• B．由IP地址求MAC地址
• C．由IP地址查域名
• D．由域名查IP地址

●内联网Intr

• ●内联网Intranet是利用因特网技术构建的企业内部网，其中必须包括(68)协议。    (68)A.TCP/IP
• B.IPX/SPX
• C.NetBuilder
• D.NetBIOS

●IP地址块192.168.80.128/27包含了(67)个可用的主机地址。

(67)

• ●IP地址块192.168.80.128/27包含了(67)个可用的主机地址。    (67)A.15
• B．16
• C．30
• D．32

●在HTML文件中，(66)是段落标记对。

(66)

• ●在HTML文件中，(66)是段落标记对。    (66)A.
• B.
• C.

• D.

●对关系S进行(62)运算，可以得到表1；对关系R和S进行(63)运算，可以得到表2。

(62)A．自然连接

B．投影

C．选择

D．并

(63)A．自然连接

B．投影

C．选择

D．并