计算机专业英语电子教案郭敏 计算机专业英语Unit5.ppt

Unit 5 Section 2 Passage A symbol high-level Language unique keyword syntax procedural language functional language object-oriented location Unit 5 Section 2 Passage B OOP paradigm datafield discrete reusable module class subroutine inherit Unit 5 Section 2 Passage B Exercises I 3. The technology of OOP focuses on ____ rather than processes. A. function B. procedure C. data D. subroutines C Unit 5 Section 2 Passage B Exercises I 4. Object is a(an) of a class. A. instance B. kind C. part D. member A Unit 5 Section 2 Passage B Exercises I 5. According to the characteristic of inheritance, class of lorry cars will have behavior. A. laughing B. moving C. eating D. breathing B Unit 5 Section 2 Passage B Exercises II 1. ( ) one of the principal advantages of object-oriented programming techniques over procedural programming techniques is that they enable programmers to create modules that do not need to be changed when a new type of object is added. 2. ( ) An object sends message to another object or asks the other object to invoke a method. 3. ( ) The object called driver may fire a car to start up by passing a “fire message which invokes the car’s “fire” method. 4. ( ) If a sub-class inherits attributes and behavior of super-classes, we at least write codes twice. 5. ( ) An instance is a blueprint that defines the variables and the methods common to all objects of a certain kind and is used to manufacture or create objects. T T T F F Unit 5 Section 2 Passage B Exercises III complex numerical weak weaknesses consumes consuming The question of which language is best is one that 1._________ a lot of time and energy among computer professionals. Every language has its strengths and 2.__________. For example, FORTRAN is a particularly good language for processing 3, _________ data, but it does not lend itself very well to organizing large programs. Pascal is very good for writing well-structured and readable programs, but it