2. 计算机
  3. Cloud computing is a phrase used to describe a variety of computing concepts that involve a large number of computers _______th

Cloud computing is a phrase used to describe a variety of computing concepts that involve a large number of computers _______th

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问题 Cloud computing is a phrase used to describe a variety of computing concepts that involve a large number of computers  _______through a real-time communication network such as the Internet．In science，cloud computing is a  _______ for distributed computing over a network，and means the _______  to run a program or application on many connected，computers at the same time．
    The architecture of a cloud is developed at three layers：infrastructure，platform，and application．The infrastucture layer is built with virtualized computestorageand network resources．The platform layer is for general—purpose and repeated usage of the collection of software resources．The application layer is formed with a collection of all needed software modules for SaaS applications．The infrastucture layer serves as the _______  for building the platform layer of the cloud．In turn，the platform layer is foundation for implementing the _______ layer for SaaS application．
(72)
选项 A、replacement
B、switch
C、substitute
D、synonym(同义词)
答案D
解析
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