学生获得正确的知讯,只有从实践中来,因此把实物标本事先准备好,课上发给人手一份,讲课时引导学生解剖观察,是生物学基本教学方法之一。以下材料可以发给学生。植物学课上的番茄、沙果、西瓜小块,向日葵茎小段(用来观察细胞)、菜豆、玉米浸润的种子,培植好的菜豆、玉米幼苗,豆根和谷类根系,装在小瓶中的各种无机盐样品,装在指形管中的小麦根毛、白菜或菠菜叶、杨或槭带芽的枝、柳茎小段、高粱杆小段(观察茎的构造)、干椴木小段或老南瓜茎(二者可见导管)、白茅、蓟的根芽、 Students get the right information, only from practice, so the physical specimens prepared in advance, a man given a class, lecturing students guide anatomy, is one of the basic biological teaching methods. The following materials can be sent to students. Botany lesson tomatoes, sago, watermelon pieces, sunflower stem segments (used to observe the cells), beans, corn infiltration seeds, cultivated good beans, corn seedlings, roots and cereal roots, packed in vials Various inorganic salt samples, wheat root hairs, cabbage or spinach leaves, branches of poplar or maple with buds, short sections of willow stems, short sections of sorghum rods (observation of the structure of stems), short segments of dried basswood or old pumpkins Stems (both visible catheters), white grass, thistle root buds,