下列各句中加点成语使用恰当的一句是（）。

A．作为销售部经理，她首当其冲地主持了这场促销活动。

B．作者借一群芸芸众生的日常生活，传递出那一特定时代里南方小城的特殊气氛。

C．因为替傅雷夫妇保存骨灰，鸣冤叫屈，江小燕过了十几年宵衣旰食的悲惨生活。

D．“民不告官”这句带有封建思想的古训，却成了这个山村村民心中颠扑不破的真理。

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) the construction of hierarchical, higher - order services that can be treated in a uniform way across layers of abstraction.

66（）

A．defined

B．represented

C．used

D．passed