She got so angry that she ran after them. She was soon            , but she continued to run.     [ ]

A. under her breath  

B. out of breath    

C. recover her breath    

D. hold her breath

直燃机房人员疏散的安全出口不应少于两个，至少应设一个直通室外的安全出口，从机房最远点到安全出口的距离不应超过（）。

A.12m

B.18m

C.24m

D.35m