All self-propelled vessels on an international voyage must be equipped with how many Emergency Position Indicating Radiobeacons (EPIRB)（）? ["One approved Class A EPIRB","Two approved Class A EPIRBs","One approved Class B EPIRBs","Two approved Class B EPIRB"]
Internet所使用的协议为（）。 ["IPX\/SPX","TCP\/IP","NETBEUI","NWLINK"]
拍卖企业应当按照《拍卖法》的规定于拍卖日（）前发布拍卖公告。拍卖企业应当在拍卖前展示拍卖标的，拍卖标的的展示时间不得少于（） ["7天；2天","5天；2天","7天；7天","5天；7天"]
拍卖企业应当在拍卖活动结束后（）天内，将竞买人名单、身份证明复印件送拍卖活动所在地工商行政管理局备案。 ["10","7","5","3"]
A vessel operating outside of coastal waters must carry an automatically activated Emergency Position Indicating Radio Beacon (EPIRB) if she（）. ["does not have berthing facilities","has berthing and galley facilities","is a workboat and her mother ship carries an EPIRB","None of the above are correct"]
简述水池给水系统中陆上水泵循环给水系统的特征及适用环境。
