管网压降、低压管网一般控制在工作压力的5-8％，压缩空气流速，一般干线取8-10m/s，车间支管取（）。
If a vessel takes a sudden，severe list or trim from an unknown cause，you should FIRST（）. ["determine the cause before taking countermeasures","assume the shift is due to off-center loading","counterflood","assume the cause is environmental force"]
在问卷调查中，客服员可根据用户填写的情况，针对不满意项目查找原因，上报相关管理人员进行（）及整改意见提出。 ["考核管理","分析","核查","核查、分析、考核管理"]
通过计算用户满意率，分析用户不满意情况，来（）情况。 ["用户不满意","用户满意","评估、分析服务","分析服务"]
If a vessel lists to port，the center of buoyancy will（）. ["move to port","move to starboard","move directly down","stay in the same positio"]
驱动系统悬挂分为（）、全悬挂、抱轴式悬挂三中形式。
