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单项选择题

A.PropertyChangeB.PropertyChangeListenerC.PropertyChang……

在J2EE中,实现了从一张列表中添加和删除PropertyChangeListener对象的方法的类是()。 

A.PropertyChange
B.PropertyChangeListener
C.PropertyChangeSupport
D.PropertyListener

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多项选择题在J2EE中,使用()选项中的代码,可以生成如下XML文档:  <PEOPLE>  <PERSON>  <NAME>Tony Blair< NAME>    < PERSON> <PEOPLE>

A.Element people = doc.createElement("PEOPLE");  Element person = doc.createElement("PERSON"); Element name = doc.createElement("NAME"); name.appendChild(doc.createTextNode("Tony Blair")); people.appendChild(person); person.appendChild(name); doc.appendChild(people);
B.Element people = doc.createElement("PEOPLE");  Element person = doc.createElement("PERSON"); people.appendChild(person); Element name = doc.createElement("NAME"); name.appendChild(doc.createTextNode("Tony Blair")); person.appendChild(name); doc.appendChild(people);
C.Element people = doc.createElement("PEOPLE");  Element person = doc.createElement("PERSON"); people.appendChild(person); Element name = doc.createElement("NAME"); name.appendText(doc.createTextNode("Tony Blair")); person.appendChild(name); doc.appendChild(people);
D.Element people = doc.createElement("PEOPLE");  Element person = doc.createElement("PERSON");Element name = doc.createElement("NAME"); name.createTextNode("Tony Blair"); people.appendChild(person); person.appendChild(name); doc.appendChild(people);