A:these, these
B:these, they
C:this, they
D:those, these
(按从上到下的顺序填写)
The fat man was very heavy and soon the chair was in ____ (piece).
呼吸道不仅能保证气体顺畅通过,还能对吸入的气体进行处理.下列对呼吸道结构和功能的叙述,错误的是( )