由3～5支终末细支气管组成的肺结构称为（）
A.肺小叶
B.初级小叶
C.次级小叶
D.肺段
E.肺腺泡
参考答案：A
He has his faults, but _____ he is an excellent teacher and we all respect him.
A．all in all
B．as a result
C．all the best
D．in other words
