![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
液压制动主缸在不制动时,其出油阀和回油阀开闭情况是()
A.出油阀关闭,回油阀开启
B.回油阀关闭,出油阀开启
C.两阀均关闭
D.两阀均开
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
C、两阀均关闭
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.出油阀关闭,回油阀开启
B.回油阀关闭,出油阀开启
C.两阀均关闭
D.两阀均开
C、两阀均关闭
A.0.1~0.3
B.0.3~0.5
C.0.4~0.6
D.0.5~0.6
A.加快后轮制动力的增长
B.限制后轮制动力在某个值
C.主缸液压压力达到某个值后,限制车轮制动力的过快增长
D.踩下制动踏板时,限制车轮制动力的过快增长
A.①、②、④
B.①、②、③
C.①、③、④
D.①、②、③、④