The pulmonary lobule is a relatively independent lung structure which is composed of a finer stage by stage bronchi and its alveolar ducts, alveoli sacs and alveoli.

The pulmonary lobule is a relatively independent lung structure which is composed of a finer stage by stage bronchi and its alveolar ducts, alveoli sacs and alveoli.
A.正确
B.错误
正确答案：正确