赵旭东的同桌今天上课时看了小说。放学后,赵旭东把这件事告诉了班主任王老师。王老师沉思了一会儿,然后给他讲了一个故事。有位老人养了一只鹦鹉,非常美丽可爱,学人说话惟妙惟肖。但是它却有一个毛病,就是常常咳嗽,而且声音混浊难听,喉咙里好像塞满了痰。主人带它去看兽医,不料检查结果显示鹦鹉完全健康。原来问题出在老人身上, Zhao Xudong's desk at the same time today read the novel. After school, Zhao Xudong told the class teacher Wang. Wang meditated for a moment, then told him a story. An old man has a parrot, very beautiful and lovely, the scholars speak vividly. But it has a problem, that is, often cough, and the voice of the hazy voice, the throat seems to be full of sputum. The owner took it to see the veterinarian, but the test results showed that the parrot is completely healthy. The original problem lies in the elderly,