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利用继承能够实现【9】。这种实现缩短了程序的开发时间，促使开发人员复用已经测试和调试好的高质量软件。

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Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. According to the professor, why is the buffalo population increasing

A. More buffalo are surviving the winter.
B. Fewer buffalo are dying of disease.
C. More buffalo are being born.
D. Fewer buffalo are being killed by hunters.

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INSURANCE POLICYThe insurer (保险公司): (46) The insured: (47) The object (投保对象) of the insurance policy: (48) of color television setThe insurance premium: (49) Classes and kinds of insurance: against (50) . 49（）

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[听力原文]8-10W: Hello, Jim. Where are you goingM: To the cinema. What about coming with meW: No, thanks. I’m going home. My friend’s expecting me.M: What a pity. I believe it’ s a very good film.W: Do you go to the cinema a lotM: Once a week. Most nights I sit at home and watch TV.W: Oh, I see. By the way, where are you going for your holidays this yearM: I don’t know yet. My wife’s going to her mother’s for a couple of weeks. She lives by the sea, you know.W: Oh, does she That’s wonderful.M: Yes, and it is very beautiful. Why can’t the woman go with him（）

A. Because she is going home.
Because she doesn’t like the film.
C. Because she is very busy with her work.
D. Because she doesn’t like the man.

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有如下定义语句： MyClass*p[10]；当类对象数组指针p离开它的作用域时，系统自动调用析构函数【10】次。

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利用继承能够实现 【9】 。这种实现缩短了程序的开发时间，促使开发人员复用已经测试和调试好的高质量软件。

Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. According to the professor, why is the buffalo population increasing

INSURANCE POLICYThe insurer (保险公司): (46) The insured: (47) The object (投保对象) of the insurance policy: (48) of color television setThe insurance premium: (49) Classes and kinds of insurance: against (50) . 49（）

有如下定义语句： MyClass*p[10]； 当类对象数组指针p离开它的作用域时，系统自动调用析构函数 【10】 次。

利用继承能够实现【9】。这种实现缩短了程序的开发时间，促使开发人员复用已经测试和调试好的高质量软件。

有如下定义语句： MyClass*p[10]；当类对象数组指针p离开它的作用域时，系统自动调用析构函数【10】次。