单项选择题
A．用例图 B．类图 C．对象图 D．部署图
A．making enhancements to software products B．developing a new software product C．correcting problems D．adapting products to new environments
A．the broadcast address for the its source address B．the bridge's LAN address for its destination address C．the bridge's LAN address for its source address D．none of the above