常见的软件工程方法有结构化方法和面向对象方法，类、继承以及多态性等概念属于（）。
参考答案：面向对象方法
解析：
面向对象方法是一种基于对象模型的程序设计方法,包括面向对象分析、面向对象设计、面向对象编程，是目前应用范围最广的设计方法。其中对象模型 包括六个要素：封装、抽象、模块化、层次结构、类、并发性。面向对象方法的主要特征是封装、继承和多态性，所以此空应填面向对象方法。
Dear Dad, I am writing this letter to you because it’s too difficult to talk about it. I can’t stop about my uncle and how he died. In fact, I seriously want to ask you to stop smoking. I’ve looked up information about smoking and I’ve found out some disturbing(令人不安的) things. You already know that smoking is bad for your breathing and can cause cancer. I’ve found out it causes many other illnesses as well. Did you know that over 100,000 people die from smoking every year in Britain? It’s the second cause of death in the world. I don’t want you to be one of these people. When Mum you to smoke outside, you think she’s just being difficult. Well, it’s true that she doesn’t like the smell of smoke in the house and on our clothes. It’s not very pleasant. However, when you smoke, it’s also bad for me and Mum. In other words, when we breathe in your smoke, it’s like we are smoke . As a result, we can get diseases as well. Doctors are finding that more and more non-smokers are falling ill because of the effects of other people’s smoking. I know that it is very difficult to stop smoking you mustn’t give in(屈服) to it. Please see the doctor and ask him for help. We will do anything we can you. You must try to save your own . You are important to us and we don’t want to lose you. Who else can I ask to help me my maths homework or fix my bike? Please don’t smoke! Your loving daughter, Kate
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