单选题：这是一个单选题的样例。答案为C，分值为2分。

这是一个单选题的样例。答案为C，分值为2分。 @[D](1)

A. this is a Person
this is a teacher
tom
B. this is a teacher
this is a Person
tom
C. 运行出错
D. 编译有两处错误




A.this is a Person
this is a teacher
tom
B.this is a teacher
this is a Person
tom
C.运行出错
D.编译有两处错误


答案：D