interfaceAltitude{//insertcodehere}和4个声明:intHIGH=7;publicintHIGH=7;abstractintHIGH=7;interfaceintHIGH=7;分别插入到第2行 有多少行可以编译?()

classOver{2.intdoIt（longx）{return3；}3.}4.5.classUnderextendsOver{6.//insertcodehere7.}和

现有:1.interfaceAnimal{2.voideat();3.}4.5.//insertcodehere6.7.publicclassHouseCatextendsFe

现有2个文件:packagex;publicclassX{publicstaticvoiddoX(){System.out.print("doX");}}和:classFind{publicstaticvoidmain(String[]args){//insertcodehere}}哪两行分别插入到类Find的第3行将编译并产生输出doX”?()

classBigDogextendsDog{2.//insertcodehere3.}分别插入到第2行 哪二项可以编译?()

现有:1.interfaceAltitude{2.//insertcodehere3.}和4个声明:intHIGH=7;publicintHIGH=7;abstractintHIGH=7;interfaceintHIGH=7;分别插入到第2行 有多少行可以编译?()

现有:1.interfaceAnimal{2.voideat();3.}4.5.//insertcodehere6.7.publicclassHouseCatimplement