草是城市的“健康皮肤”,却是庄稼地的“狗皮膏药”,一茬接一茬,怎么拔都拔不净,真令人头痛。我们自然小组的老师和同学因为负责劳动基地的管理工作,也饱受拔草之苦,都憋了一股劲要消灭它。 在学习了《种子的萌发》一课后,有几位同学对我说:“老师,草也是由草的种子——草籽萌发后长成的。如果我们想办法破坏草籽的萌发条件,那地里是不是就不长草了?”我的眼前豁然一亮,多好的想法呀!我 Grass is the city's “healthy skin”, but it is the crop of “dog skin plaster”, a stubble after a stubble, how unplug unpredictable, really a headache. Our natural group of teachers and students responsible for the management of the labor base, but also suffered the pain of weeding, are holding back a wave of energy to eliminate it. Several students said to me after learning a lesson about “seed germination”: “The teacher, the grass is also the seed of grass, which grows after the seed germination.if we think of a way to destroy the seed germination condition, Is not that there is not a long grass in the field? ”Suddenly my eyes, what a good idea! I