Authorware是一种优秀的多媒体开发工具，能实现非常复杂的多媒体接 入及程序流程 控制，但在开发功能结构类似，信息资源丰富的模块时，还存在程序设计复杂，代码重复量 大，模块功能更改困难等问题。本文针对以上问题，在设计大学英语四级多媒体教学系统时 ，提出了一套基于模块化结构的大学英语四级MCAI教学软件的设计思想，并以听力部分为例 ，详细介绍了该部分各功能模块的实现。%Authorware is an excellent tool for developing multime dia systems. It can implement complex multimedia interfacing and program process con trol. However, there still exist problems such as programming complexity, code repetit ion and difficulty of module function updating in re-developing similar modules wit h large quantity of data. This paper purposes a new method of implementing a modul arized Multimedia CAI System for College English Test Band 4 (CET-4). Finally, it illu strates how to implement the functions of modules by a sample for Listening Comprehensio n.
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