辩证唯物主义的物质定义。
信用证结算方式所涉及到的主要当事人有（）。 ["受益人","开证行","通知行","议付行"]
期间的耽误
对政府采购活动实施（）管理，在政府采购活动中建立政府采购、资产管理、财会、内部审计、纪检监察等部门或岗位相互协调、相互制约的机制。 ["A.对口 ","B.对等 ","C.等级 ","D.归口"]
The Great Barrier Reef is included on the World Heritage list because（） ["it has the most beautiful seascape in the world","it has the greatest number of islands in the world","it has the most diverse and complex marine life in the world","it has the longest coast in the world"]
什么叫设备档案？
