A.服務提供者 B.服務請求者 C.服務代理者 D.服務綁定者
A.404 B.200 C.500 D.0
A.DocumentBuilderbuilder=newDocumentBuilder(); B.DocumentBuilderbuilder=newDocumentBuilderFactory() C.DocumentBuilderbuilder=DocumentBuilderFactory.newInstance(); D.DocumentBuilderbuilder=DocumentBuilderFactory.newInstance().newDocumentBuilder();