由数字1，2，3，4，5组成无重复数字的二位奇数个数是

A．5

B．8

C．10

D．12

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

A．50MB

B．100MB

C．200MB

D．150MB

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

A．into

B．off

C．onto

D．out

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