关于析构函数的描述,错误的是____
A. 析构函数可以重载
B. 当撤销对象时,系统会自动地调用析构函数
C. 析构函数不能带参数
D. 析构函数不能有返回值
面向对象的三个特性不包括哪一个？
A. 封装性
B. 可扩展性
C. 继承性
D. 多态性
4. What is/are true about extended examples?
A. Six basic questions will help to elaborate and extend examples
B. One extended example is not sufficient to support a claim
C. A single extended example can support a claim
D. An extended example cannot be personal experience
3. What are the purposes to use examples in essay writing?
A. To make abstract ideas concrete
B. To make general opinions more specific
C. To provide a summary
D. To clarify vague statements
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