网友回答：
snakes are cold-blooded animals. in winter they hibernatein holes which are narrow enough only to hold the snakes bodies. the snakes can sleep through a whole winter without eating and moving. they can not feel any pain. the hibernation period lasts about
温馨提醒：随时光变迁，文中所陈述观点；准确性、难免有所变动，因此文中观点仅供参考。
