At a basic level, cloud computing is simply a means of delivering IT resources as( ). Almost all IT resources can be delivered as a cloud service: applications, compute power, storage capacity, networking, programming tools, even communication services and collaboration( ). Cloud computing began as large-scale Internet service providers such as Google, Amazon, and others built out their infrastructure. An architecture emerged: massively scaled,( )distributed system resources, abstracted as virtual IT services and managed as continuously configured, pooled resources. In this architecture, the data is mostly resident on(请作答此空)"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 with stand failures of( )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. A.clients B.middleware C.servers D.hard disks
Teams are required for most engineering projects.Although some small hardware or software products can be developed by individuals,the scale and complexity of modern systems is such,and the demand for short schedules so great,that it is no longer（请作答此空）for one person to do most engineering jobs.Systems development is a team（ ）,and the effectiveness of the team largely determines the（ ）of the engineering. Development teams often behave much like baseball or basketball teams.Even though they may have multiple specialties,all the members work toward（ ）.However,on systems maintenance and enhancement teams,the engineers often work relatively independently,much like wrestling and track teams. A team is（ ）just a group of people who happen to work together.Teamwork takes practice and it involves special skills.Teams require common processes;they need agreed-upon goals;and they need effective guidance and leadership.The methods for guiding and leading such teams are well known,but they are not obvious. A.convenient B.existing C.practical D.real
The lights of the car passing the end of the street showed that . A. a woman was walking by herself up the street B. a man was walking up the street C. a man was driving by himself up the street D. a woman was driving the car
