单选题
1分
If the PSCO uncertain the source of water pressuring during the inspection of fire main system, in s...
If the PSCO uncertain the source of water pressuring during the inspection of fire main system, in such case, you can test ______for him.
参考答案: B
参考解析: 假如PSC官员在主系统检查时不能确定水压的来源,在这种情况下,你可给他测试机舱的消防主隔离阀。