薛大龙是一名教师，学历博士，性别男，身高180，主讲软考，擅长打五笔字型。该实例中类和对象相关描述，正确的是（ ）。
- A.薛大龙是对象，教师是类，性别身高是状态信息，讲课和打五笔字型是对象行为
- B.薛大龙是类，教师是对象，性别身高是状态信息，打五笔字型是对象行为
- C.薛大龙是状态信息，教师是类，性别身高是对象，讲课和打五笔字型是对象行为
- D.薛大龙是对象，教师是状态信息，性别身高是类，讲课是对象行为
正确答案及解析
正确答案
解析
面向对象的基本概念：包括对象、类、抽象、封装、继承等，其中对象：由数据及操作所构成的封装体，是系统中用来描述客观事物的一个模块，是构成系统的基本单位。包括对象标识、对象状态、对象行为，其中每个对象都有一个对象标识，对象状态是对对象的静态描述，而对象行为是对对象的动态特征的描述。类是现实世界中对实体的形式化或抽象的描述。类是对象的抽象，对象是类的实例，题中：教师属于类，薛大龙是教师类的一个实例，性别和身高都是薛大龙这个对象的静态特征属性，讲课和打五笔字型是薛大龙这个对象的动态特征行为。
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