Flu virus can come on along with infection the excrement and urine of birds pollutes birdhouse with rhinal secretion eduction , basket , mat makings 流感病毒可以随感染发病禽的粪便和鼻腔分泌物排出而污染禽舍、笼具、垫料等。
3.
Nose can scent all sorts of flavour , because be in , be rhinal wall , have an about 5 square centimeter mucous membrane , distributinging move cell of many 1000 smell , they and cerebra have connection 鼻子能闻出各种味道，是因为在鼻腔的内壁，有一块大约5平方厘米的黏膜，分布着1000多万个嗅觉细胞，它们与大脑有联系。
