单项选择题
Microsoft's COM is a software（1）that allows applications to be built from binary software components. COM is the underlying architecture that forms the foundation for higher-level software services, like those provided by OLE. COM defines a binary standard for function calling between components,a way for components to dynarmically discover the interfaces implemented by other components, and amechanism to identify components and their interfaces uniquely. OLE is a compound（2）standard developed by Microsoft. OLE makes it possible to create（3）with one application and link or embed them in a second application.Embedded objects retain their original format and（4）to the application that created them. Support for OLE is builtinto the Windows and MacOS Operating Systems.A（5）compound document standard developed mainly by Apple and IBM is called OpenDoc.
单项选择题
某公司欲开发一个在线交易系统，在架构设计阶段公司的架构师识别出3个核心质量属性场景。其中“在并发用户数量为1000人时，用户的交易请求需要在0.5秒内得到响应”主要与（1）质量属性相关，通常可采用（2）架构策略实现该属性；“当系统由于软件故障意外崩溃后，需要在0.5小时内恢复正常运行”主要与（3）质量属性相关，通常可采用（4）架构策略实现该属性；“系统应该能够抵挡恶意用户的入侵行为，并进行报警和记录”主要与（5）质量属性相关，通常可采用（6）架构策略实现该属性。
如果每个元件能否正常工作是相互独立的，每个元件能正常工作的概率为p，那么此系统的可靠度（元件或系统正常工作的概率通常称为可靠度）为（）
