随着教育改革的不断发展和深化，电教媒体在生物学教学中越来越被重视，且发挥出了重要的作用。电教媒体类型与内容的选择是否合适，使用是否得当，都应以教学目标为衡量标志。生物学的教学目标是由教学大纲决定的，因此，电教媒体的选择、使用要始终服从于这一目标。１?.. With the continuous development and deepening of education reform, audio-visual education media has become more and more important in biological teaching, and has played an important role. Whether the type of media and content of audio-visual education media is appropriate and whether the use is appropriate should be measured by teaching objectives. The teaching goal of biology is determined by the syllabus. Therefore, the selection and use of audio-visual media should always be subject to this goal. 1?..