●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) theconstruction of hierarchical，higher-order services that can be treated in a uniform. way across layersof abstraction.(66) A．definedB．representedC．usedD．passed(67) A．providesB．haveC．expandsD．limits(68) A．elementsB．objectsC．servicesD．capability(69) A．ofB．toC．asD．from(70) A．formsB．groupsC．consistD．Facilitates
●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 implemente
D． (70) theconstruction of hierarchical，higher-order services that can be treated in a uniform. way across layersof abstraction.
(66) A．defined
B．represented
C．used
D．passed
(67) A．provides
B．have
C．expands
D．limits
(68) A．elements
B．objects
C．services
D．capability
(69) A．of
B．to
C．as
D．from
(70) A．forms
B．groups
C．consist
D．Facilitates