BSJ-2200监控系统可以实现哪几级的权限管理？
“汇通华夏”适用范围包括（） ["华夏卡","华夏信用卡","华夏联名卡","活期储蓄存折"]
周期是指信号完成一个波形循环所要经历的（）。 ["空间","间隔","时间","相位差"]
对于一些关系到国计民生的要害单位及跨区域单位的保卫工作，可以按照（）原则确定管理对象，以便于宏观协调。 ["目标管理","分级管理","科学管理","人本管理"]
You are making tow.A loaded，open-hopper barge with independent tanks has placards，with alternating red and white quadrants，located at each side and end.You inspect the barge and find slight traces of water in the wing voids due to condensation.What（）. ["Refuse to accept the barge until all wing voids are dry","Accept the barge and when weather conditions permit run with the wing voids open to ventilate the spaces","Accept the barge and periodically check the wing voids","Return the barge to the fleet and depart without the barge"]
在BSJ-2200监控系统中如何实现对光字牌状态的监视？如何复归保护信号？如何清光字？复归信号、清光字时应注意什么？
