单项选择

Sam came to school as_____as Tom. They were both_____for school.[ ]

A. late; late

B. later; later

C. late; later

D. later; late

呼吸衰竭的病因没有下面哪项（）

A.胸廓畸形

B.气管异物

C.广泛肺炎

D.腹水、腹内压升高

E.氰化物中毒