多选题 阅读以下代码,横线处填写()无法在控制台输出‘无忧无虑 哦!’。(选择两项) A. Roo one =new Roo(); one.leap(); B. Animal one =new Roo(); ((Roo)one).leap(); C. Roo pet=new Animal(); pet.leap(); D. Animal pet =new Animal(); Roo roo =new (Roo) pet; roo.leap();
【简答题】In the years of my growing up, Dad was strict with me. He made sure I made my bed and did my第三部分:写作 第一节:阅读表达 阅读短文,并按照题目要求用英语回答问题。 In the years of my growing up, Dad was strict with me. He made sure I ...