《植物怎样“喝水”》一课,主要是通过观察、实验,让儿童认识植物水份的代谢过程。根毛、导管、气孔标本制作的成功与否,是上好这堂课的关键。我经过多次摸索,把这件本来感到为难的事,变得此较容易了。我的制作方法是: 【根毛】城市学校可到粮店购蚕豆、黄豆等种籽制作,农村学校用刀豆种籽更好,因为大一点的种籽易于观察。制作标本时,先浸好种,再播到沙(或海绵)盆里,用一个能透光、透气的盖子罩着,使 “How plants” drink water “” A lesson, mainly through observation, experiment, let the children know the plant's water metabolism process. Root hairs, catheters, stoma specimens of the success or failure, is the key to a good class. After many guesses, I made it easier to do something that I had been embarrassed to do. My production method is: [root hair] urban schools to the grain shop to buy beans, soybeans and other seed production, rural school with beans seeds better, because the larger the seeds easy to observe. When making the specimens, soak them first, then sow them in sand (or sponge) baskets and cover them with a light-permeable, breathable cover