Does Jimmy always go to school by bus? No, rather than __________ on a crowded bus, he always prefers __________ a bike. A. ride, ride B. riding, ride C. ride, to ride D. to ride, riding
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参考答案:
举一反三
【单选题】已知类的继承关系如下: class A class B extends A class C extends A 则以下语句能通过编译的是( )A: A a=new B();B: C c=new B();C: C c=new A();D: B b=new C();