副风缸是储存压力空气的容器，在制动时，借（）的作用将其压力空气送入制动缸，发挥制动作用。
参考答案：分配阀
秦始皇陵的考古发现？
Food safety issues, ____ will seriously affect the growth of teenagers and even the nation's future. [ ]
A. if not solved properly
B. not if solved properly
C. if solved properly
D. not if properly solved
