发明启迪思路:在实验课上洗烧瓶时,我发现用普通的直形的烧瓶刷不能清洗掉烧瓶内侧和靠瓶颈部分的污垢,于是我就设想能否将烧瓶刷的毛刷部分制成活动的、可调角度的形式。我的这一想法得到了老师的肯定与支持。在老师指导下,我运用了自然课中所学的杠杆原理和数学中有关角度变化的知识,制成了“万向烧瓶刷”。 Invention enlightenment ideas: washing flask in the experimental class, I found that with ordinary straight-shaped flask brush can not clean the inside of the flask and by the bottleneck part of the dirt, so I would imagine whether the brush part of the flask can be made into activity The angle of the form. My idea has been the teacher's recognition and support. Under the guidance of the teacher, I made use of the lever principle learned in nature class and the knowledge about angle change in mathematics to make “universal flask brush”.