Service (71) Architecture aims to provide a model for the creation of service components in a wide range of languages and a model for assembling service components into a business solution-activities which are at the heart of building applications using a (72) architecture.
Service Data Objects aims to provide consistent means of handling (73) within applications, whatever its source or (74) may be. SDO provides a way of unifying data handling for databases and for services. SDO also has mechanisms for the handling of data while (75) from its source.

A．Oriented

B．Level

C．Component

D．Conference

动车组最高运行速度200km/h时紧急制动距离限值为（）。

A.1000m

B.2000m

C.3000m

D.3500m