Pump up the starting air reservoirs to their maximum pressure and （）the air reservoirs and air system.<br>A:open<br>B:close<br>C:drain<br>D:vent

Pump up the starting air reservoirs to their maximum pressure and （）the air reservoirs and air system.
A:open
B:close
C:drain
D:vent

出自：海船船员证

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10250343】个 (题库试题定时更新)