紧急制动时，由于容积室的压力迅速增大到一定值，增压阀杆上移到开放位，总风与容积室连通，容积室增压，通过均衡部使（）增压，提高制动缸压力。
参考答案：制动缸
We'd better send the injured man to the hospital as as we can. [ ]
A. more quickly
B. quickly
C. most quickly
D. the most quickly
下列应征收消费税的轮胎是( )。
A．拖拉机专用轮胎B．拖拉机和汽车通用轮胎C．子午线轮胎D．翻新轮胎
