Environmental pollution and preventionCrew：滕达、朱梦浩、沙科成、路飞在整堂课的教学中，刘教师总是让学生带着问题来学习，而问题的设置具有一定的梯度，由浅入深，所提出的问题也很明确Environmental pollution and preventionSoil pollution hazards and the status quo3The concept of characteristics of the soil pollution 1Soil pollution reasons24Of soil pollution prevention and control measures在整堂课的教学中，刘教师总是让学生带着问题来学习，而问题的设置具有一定的梯度，由浅入深，所提出的问题也很明确First, the concept of the characteristics of the soil pollution What is soil pollution？ Soil pollution harmful toxic substances i
