在家庭或是在公共场所,出于卫生和方便考虑,人们洗手或是洗脸时,总是习惯打开水龙头直接冲洗。可是问题也就随之出现了:水的流量不便掌控。在多数情况下,缺乏节水意识的人很少会将阀门回旋,而是让水任意流淌,造成水资源浪费。在学校里,我通过观察还发现,下课后,同学们拥至水房,有些同学用完水后急于上厕所或是回教室,或误以为身后还有等待用水的同学,就不主动关水,致使水 At home or in public, it is always hygienic and convenient to wash the faucet when people are washing their hands or washing their face. However, the problem also appeared: the flow of water inconvenient control. In most cases, the lack of awareness of water-saving valve will rarely swing, but let water flow freely, resulting in waste of water resources. In school, I also found through observation that after class, the students swarmed to the water room. Some students eager to go to the toilet or go back to the classroom after using water or mistakenly thought that students behind waiting for water did not take the initiative to shut down the water , Resulting in water