A．into

B．off

C．onto

D．out

总线是CPU与存储器、外部设备等部件交换信息的通路。总线工作的特点是各设备(5)使用。按照总线传送的信息分类，可分为(6)3类。

A．分时

B．共享

C．分时共享

D．独立使用

如果把由数转换得到的二叉树叫做这棵树对应的二叉树，下面结论中正确的是(11)。

A．树的先根遍历与其对应的二叉树的先根遍历相同

B．树的后根遍历与其对应的二叉树的后根遍历相同

C．树的先根遍历与其对应的二叉树的中根遍历相同

D．以上都不对

是父类和子类之间共享数据和方法的机制。

A．多态

B．继承

C．绑定

D．重置

微机用的系统，总线有多种，其中(3)是早期工业标准体系结构单总线的直接扩展，并向下与其兼容；(4)首先应用于奔腾机，数据线宽度已可为64位，并有数据缓冲能力。

A．VESA

B．SCSI

C．EISA

D．PCI

A basic premise of OGSA is that everything is(66)by a service: a network enabledentity that(67)some capability through the exchange of messages. Computational resources, storage resources, networks, programs, databases, and so forth are all(68). This adoption of auniform. service-oriented model means that all components of the environment are virtual. Morespecifically, OGSA represents everything as a Grid service: a Web service that conforms(69)a set of conventions and supports standard interfaces for such purposes as lifetime management. This core set of consistent interfaces, from which all Grid services are implemented.(70)the construction of hierarchical, higher - order services that can be treated in a uniform. way across layers of abstraction.

A．defined

B．represented

C．used

D．passed