几种危害健康的习惯一、拘耳。人的耳朵由数块小骨头组成，耳内有耳膜，再道壁上密布着小血管。有的同学喜欢用火柴棍或质地较硬的草根掏耳屎，这是极不卫生的习惯。回为火柴棍或其他掏耳的东西，表面上粘有许多细菌，一不小心，将耳道壁的血管刺破就会引起耳内感染，如果... Several habits that endanger the health First, the ear. The human ear consists of several small bones, ears with eardrums, and then the wall covered with small blood vessels. Some students like to use sticks or texture of hard grass dig earwax, this is a very unhealthy habits. Back as a match stick or other dig ear things, the surface sticky many bacteria, accidentally piercing the ear canal wall will cause ear infections, if ...