一般在小学自然课和中学生物课上,教师多利用自己及学生采制的植物标本进行教学。这种标本往往不够完整或不够典型,并存在易损坏和变质的缺点,影响到直观教学的效果。近年来,河北省张家口市植物标本站为了提高教学质量,在当地教委及有关单位的支持下,推出了适应教学及科研需要的新型植物标本,包括塑封、覆膜及腊叶三种产品,并于1990年11月通过了市级鉴定,目前已批量生产投放 Normally in elementary school nature class and middle school biology class, teachers use their own and students to make plant specimens for teaching. Such specimens are often not complete enough or not typical, and there is the shortcomings of damage and deterioration, affecting the effectiveness of visual teaching. In recent years, in order to improve the quality of teaching, the Plant Specimen Station of Zhangjiakou City, Hebei Province has launched three new types of plant specimens suitable for teaching and scientific research, including plastic seals, laminates and leaves, with the support of the local education commission and relevant units. And in November 1990 passed the municipal appraisal, has been put into mass production