什么是商品分类、商品分类体系？
EISU简称为（） ["多功能一体化监控设备","一体化监控设备","增强型多功能一体化监控设备","增强智能性采集单元"]
在理财计划的存续期内，一般账单提供应不少于（） ["2次且至少每月一次","2次且至少每季一次","3次","6次"]
MISU（PA）简称为（） ["多功能一体化监控设备","一体化监控设备","增强型多功能一体化监控设备","增强智能性采集单元"]
Each person at the reunion was required to talk to other relatives to find out if they would buy one of the histories（）it were printed. ["whether","if","when","after"]
在孔内作业，孔外必须设安全警示标志，并设专人看守，随时观察孔内（）情况
