试题10 从供选择的答案中，选出应填入下面叙述中__内的最确切的解答，把相应编号写在答卷的对应栏内。 公开密钥方法的主要优点之一是__A__。RSA算法的基础是__B__。当N个用户采用公开密钥方法保密通讯时，系统中一共有__C__个密钥，每个用户要小心保管好__D__个密钥，为了防止不老实用户否认他们曾经通过计算机发送过的文件，较简便的方法是利用公开密钥方法完成__E__

从下面提供的答案中选出应填入下列英文语句中______内的正确答案。

(1)whether to go with a shared or switched fast LAN technology once you start to max out your shared Ethernet of token-ring LAN is tough call. Users and analysts involved in(2)high-speed LANs have leamed the benefits of each. However there are trade-offs to each, and(3)which fast LAN technology to choose is critical for(4)network performance problems and(5)costly purchasing mistakes.

供选择的答案：

(1) avoiding (2) clipping (3) choosing (4) deciding

(5) dissolving (6) ensuring (7) evolving (8) implementing

(9) knowing (10) solving

从供选择的答案中选出应填入下面一段英文中______内的正确答案。

Java was introduced by Sun Microsystems in 1995 and instantly(1)created a new sense of the interactive possibilities ofthe Web. Both ofthe major Web browsers include a Java(2)virtual machine. Almost all major operating system developers (IBM, Microsoft, and others) have added Java(3)compilers as part oftheir product offerings.

The Java virtual machine includes an optional just-in-time compiler that(4)dynamically compiles bytecode into executable code as an alternative to(5)interpreting one bytecode instruction at a time. In many(6)cases, the dynamic JIT compilation is faster than the virtual machine interpretation.

JavaScript should not be(7)confused with Java. JavaScript, which originated at Netscape, is interpreted at a higher level, is easier to learn than Java, but(8)lacks some of the portability of Java and the speed of bytecode. Because Java applets will run on almost any operating system without(8)requiring recompilation and because Java has no operating system-unique extensions or variations, Java is generally regarded as the most strategic(10)language in which to develop applications for the Web.

供选择的答案：

1．confused 2．compilers 3．dynamically 4．requiring 5．cases

6．interpreting 7．language 8．virtual 9．created 10．lacks

从供选择的答案中选出正确的答案填入下面的()中。

块间联系和块内联系是评价程序模块结构质量的重要标准。联系的方式、共用信息的作用、共用信息的数量和接口的(A)等因素决定了块间联系的大小。在块内联系中，(B)的块内联系最强。

SD方法的总的原则是使每个模块执行(C)功能，模块间传送(D)参数，模块通过(E)语句调用其他模块，而且模块间传送的参数应尽量(F)。

此外，SD方法还提出了判定的作用范围和模块的控制范围等概念。SD方法认为，(G)应该是(H)的子集。

供选择的答案：

A：①友好性

②健壮性

③简单性

④安全性

B：①巧合内聚

②功能内聚

③通信内聚

④信息内聚

C：①一个

②多个

D：①数据型

②控制型

③混合型

E：①直接引用

②标准调用

③中断

④宏调用

F：①少

②多

G～H：①作用范围

②控制范围

从供选择的答案中选出应填入下列叙述中()内的正确答案：

(1)PC总线(A)

(2)输入设备(B)

(3)网络技术(C)

(4)CPU(D)

(5)汉字技术(E)

供选择的答案

A～E：①EISA、PCI、DMA ②键盘、光笔、显示器

③EISA、ISA、PCI ④P5、80386、DRAM

⑤路由器、网桥、PowerPC ⑥触摸屏、摄象机、鼠标器

⑦Internet、TCP/IP、Gateway ⑧CD-ROM、ISA、MPC

⑨国标码、外码、MPC ⑩PowerPC、Pentium、Super SPARC

(11)内码、GB2312-80、字模 (12)X.25、PCI、数据压缩技术

从供选择的答案中选出应填入下列叙述中()内的正确答案：

数据库系统是由(A) 、(B) 、(C) 和软件支持系统组成，其中(A) 是物质基础，软件支持系统中(D) 是不可缺少的，(B) 体现数据之间的联系，(C) 简称DBA。常见的数据模型有多种， 目前使用较多的数据模型为(E)模型。

供选择的答案

A～D：①计算机硬件 ②C语言 ③CPU ④数据库管理系统

⑤数据库 ⑥主菜单 ⑦人 ⑧网络管理系统

E： ①层次 ②网状 ③关系 ④拓朴

从供选择的答案中选出应填入英语文句中()的正确的答案。

Software products may be (A) into four basic types: application programs, programming language processors, operating systems, and system utilities.

Application programs are programs that (B) useful tasks such as solving statistical problems, or keeping your company's books.

Programming language processors are programs that (C) the use if a computer language in a computer system. They are tools for the development of application programs.

Operating systems are programs that (D) the system resources and enable you to run application programs.

System utilities are special programs that (E) the usefulness of or add capabilities to a computer.

A～E: ① manage ② perform ③ support ④ reduce

⑤ divided ⑥ enhance ⑦ implemented ⑧ introduce

⑨ ranked ⑩ run

从供选择的答案中选出应填入英语文句中()的正确的答案。

Software quality assurance is now an (A) sub-discipline of software engineering. As Buckly and Oston point out, (B) software quality assurance is likely to lead to an ultimate (C) of software costs. However, the major hurdle in the path of software management in this area is the lack of (D) software standards. The development of accepted and generally applicable standards should be one of the principal goals of (E) in software engineering.

A: ① emerging ② emergent ③ engaging ④ evolve

B: ① effective ② effortless ③ light ④ week

C: ① balance ② growth ③ production ④ reduction

D: ① usable ② usage ③ useless ④ useness

E: ① management ② planning ③ production ④ research

从供选择的答案中选出应填入下列叙述中()内的正确答案：

在高级语言中，子程序调用语句中的(A) 在个数、类型、/I匝序方面都要与子程序说明中给出的(B) 相一致。用高级语言编写的程序经编译后产生的程序叫(C) 。用不同语言编写的程序产生(C) 后，可用(D) 连接在一起生成机器可执行的程序。在机器里真正执行的是(E)。

供选择的答案

A、B；①实际参数 ②条件参数 ③形式参数 ④局部参数

⑤全局参数

C～E：①源程序 ②目标程序 ③函数 ④过程

⑤机器指令代码 ⑥模块 ⑦连接程序 ⑧程序库