7、nta){//dosomething...}D.publicintaddValue(inta,intb)throwsMyException{//dosomething...} 18、下列哪个类的声明是正确的?()A.abstract final class HI{} B.abstract private move(){} C.protected private number; D.public abstract class Car{}19、关于被私有访问控制符private修饰的成员变量,以下说法正确的是()A