[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fOqL50PZikkE2NGsCIcmTkE0joCo2YRU5lBmpubSwPdo":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":21,"type":22},[],"2026-05-19 21:54:51",377954424,[8,9,10,11],"Dog dog = ani","Dog dog = (Dog)ani","Animal ani = (Dog)new Animal( )","Animal ani = Dog",{"courseId":13,"courseImg":14,"courseName":15},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","关于向下转型语法,正确写法是( )",[18,23,32,40,49],{"answer":19,"createTime":5,"id":6,"options":20,"question":16,"source":21,"type":22},[],[8,9,10,11],"v1",0,{"answer":24,"createTime":5,"id":25,"options":26,"question":31,"source":21,"type":22},[],377954425,[27,28,29,30],"编译报错","编译通过,运行正常无异常","编译通过,运行抛 ClassCastException","属于向上转型","已知Animal ani = new Dog( );,执行Dog dog = (Dog)ani;结果是( )",{"answer":33,"createTime":5,"id":34,"options":35,"question":39,"source":21,"type":22},[],377954426,[27,36,37,38],"编译通过,运行抛出类型转换异常","编译运行都正常","自动向上转型","已知Animal ani = new Animal( );,执行Dog dog = (Dog)ani;结果是( )",{"answer":41,"createTime":5,"id":42,"options":43,"question":48,"source":21,"type":22},[],377954427,[44,45,46,47],"格式:父类引用 指向 子类对象","可以直接调用子类独有的方法","能调用父类方法,重写方法执行子类逻辑","无需强制类型转换","关于向上转型特点,说法错误的是( )",{"answer":50,"createTime":51,"id":52,"options":53,"question":59,"source":21,"type":22},[],"2026-05-25 15:18:08",386547357,[54,55,56,57,58],"可适当卧床休息,减少肠蠕动、同时注意腹部保暖、以免受凉加重腹泻","指导患者少喝水,以免刺激排便","长时间腹泻可导致水、电解质紊乱","严重腹泻时,可暂时停止进食","如为肠道感染引起的腹泻,可遵医嘱给予抗生素进行治疗","下列关于腹泻患者的护理,错误的是( )"]