水份对天然气输送有哪些影响？
简述财政三大职能的含义。
下列说法错误的是（）。 ["顺槽变坡大的地点、弯道处及长距离运输途中应加设点铃，提放重车时，应有专人在此处发送信号。","严禁行人骑跨钢丝绳，绞车运输过程中，行人应站在绳道以外的安全地方。","绞车滚筒上钢丝绳排列整齐有序。出现缠绕较乱时，要及时停车处理。","工作面磨架绞车开动时，直接由现场指挥人员向绞车司机发出信号，可以不用进行信号确认"]
口径（）mm以及更大的混凝土管通常都加钢筋 ["300","500","800","1000"]
ou are implementing control file multiplexing. Which of the following choices identifies the method you can use in order to generate the control file copies that Oracle will maintain?（） ["Issue ALTER DATABASE BACKUP CONTROLFILE TO filename","Make a copy of the control file with the database shut down","Issue ALTER DATABASE BACKUP CONTROLFILE TO trace","Make a copy of the control file with the database still running&e"]
知觉障碍包括有（）、（）、（）。
