外界气体进入肺的途径是( )
A:鼻→咽→喉→气管→支气管
B:口→鼻→喉→气管→支气管
C:咽→口→鼻→喉→支气管
D:鼻→咽→喉→支气管→气管
More and more parks ________in Mentougou in five years.
- Who's that old man?
- He _______ our music teacher.
平仄协调,字数相等,结构相同,是对仗的基本要求。下列各组成语中,构不成对仗的一项是 ( )