一、改进思想的提出在农村中小学教学中,缺乏实验材料:乙醚,“压缩气体使气体液化”这一实验,只能由老师在黑板上演示.尽管有乙醚,乙醚容易蒸发,并且乙醚是有毒的气体,不利于学生的健康和安全.二、实验改进方法1.材料注射器、气体打火机、水笔笔芯的橡皮帽各一只.这些材料都可以从日常生活中寻找.2.操作方法首先,取下橡皮帽并在其封闭端用针尖快戳一个小孔.其次,找一有“气”打火机,取下前端金属罩、齿轮、火塞,只留杠杆阀门和出气口.第三,连接打火机、橡皮帽、和注射器,给注射器充气:先把橡皮帽套在注射器出口上,并把活塞推到底部,尽量排出筒内空气.接着,把打火机出气口对准橡皮帽打孔处,用力使三者接合紧密.再压下杠杆阀门,实现充气.停止充气时,为了保证气密性,最好用手指压住 First, the idea of ​​improvement in the teaching of rural primary and secondary schools, the lack of experimental materials: ether, “compressed gas to gas liquefaction ” This experiment can only be demonstrated by the teacher on the blackboard. Despite the ether, ether is easily evaporated, and Ether is a toxic gas that is not conducive to the health and safety of students. Second, the experimental improvement methods 1. Material syringes, gas lighters, rubber pen caps each one. These materials can be found in everyday life. 2. Operation Method First, remove the rubber cap and quickly poke a small hole at the closed end with a needle tip. Next, find a “gas” lighter, remove the front metal cover, gear, and fire plug, leaving only the lever valve and outlet Third, connect the lighter, rubber cap, and syringe to inflate the syringe: first put the rubber cap on the syringe outlet and push the piston to the bottom to remove the air from the cylinder as far as possible. Then, align the outlet of the lighter with the rubber cap. Punch, force the three to engage tightly. Then depress the lever valve to achieve inflation. Stop inflation, in order to ensure airtight, it is best to press with your fingers