题目内容
(请给出正确答案)
[单选题]
publicclassPet{publicvoidspeak(){System.out.print(Pet”);}}publicclassCatextendsPet{publicvoidspeak(){System.out.print(Cat”);}}publicclassDogextendsPet{publicvoidspeak(){System.out.print(Dog”);}}执行代码Pet[]p={newCat(),newDog(),newPet()};for(inti=0;i〈p.length;i++)p[i].speak();后输出的内容是哪项?()
A.PetPetPet
B.CatCatCat
C.CatDogPet
D.CatDogDog
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