在一级保护区以外划定的水域和陆域为二级保护区，其水质不低于( )。

A．Ⅰ类标准

B．Ⅱ类标准

C．Ⅲ类标准

D．Ⅳ类标准

Service ______ Architecture aims to provide a model for the creation of service components in a widerange of languages and a model for assembling service components into a business solution - activities which areat the heart of building applications using a ______ architecture.
Service Data Objects aims to provide consistent means of handling ______ within applications,whatever its source or ______ may be. SDO provides a way of unifying data handling for databases and forservices. SDO also has mechanisms for the handling of data while ______ from its source.

A. link B. format C. procedure D. structure