As the bronchi gradually become smaller, the walls of the tubes become thinner, and the glands gradually decrease or disappear.
As the bronchi gradually become smaller, the walls of the tubes become thinner, and the glands gradually decrease or disappear.
A.正确
B.错误
正确答案:正确
Tag:动物解剖生理
时间:2021-12-25 22:22:59