At a basic level,cloud computing is simply a means of delivering ITresources as ____(71)___.Almost all IT resources can be belivered as a cloud service:applications,compute power,storage capacity,networking,programming tools,even communication services and collaboration ____(72)____. Cloud computing began as large-scale Internet service providers such as Google,Amazon,and others built out their infrastructure.Anarchitecture emerged:massively scaled,____(73)____ distributed system resources,abstracted as virtual IT services and managed as continuously configured,pooled resources.In this architecture,the data is mostly resident on ___(74)___ "somewhere on the Internet" and the application runs on both the "cloud servers" and the user’s browser. Both clouds and grids are built to scale horizontally very efficiently.Both are built to withstand failures of ___(75)___ elements or nodes.Both are charged on a per-use basis.But while grids typically process batch jobs,with a defined start and end point,cloud services can be continuous.What’s more,clouds expand the types of resources available - file storage,databases,and Web services - and extend the applicability to Web and enterprise applications.

（71）处填（）。

A．hardware

B．computers

C．services

D．software

房地产经纪机构的组织结构形式中，分部制组织结构形式的优点不包括：( )。

A．各分部有较大的自主经营权，利于发挥分部管理者的积极性和主动性
B．利于高层管理者摆脱日常事务，集中精力抓全局性、长远性的战略决策
C．利于培养高层管理者的后备人才
D．各分部之间的横向联系和协调较易