连接分析图的一般符号用圆（○）表示（）. ["操作者","设备","操作连接","储存"]
In order for a controller-based access point to be allowed to participate in aggressive load balancing，it must have heard the client within how many seconds？（） ["15","10","1","5"]
锅炉检修中应注意用电安全，在锅筒和潮湿的烟道内检验而用电灯照明时，照明电压不应超过（）V。 ["24","36","48","110"]
我国的商业银行实行一级法人体制，其分支机构没有对外签约权。
沿着刀具前进方向观察，刀具中心轨迹偏在工件轮廓的右边时，用（）补偿指令。 ["左刀","右刀","前刀","后刀"]
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