Section V of the ADMIRALTY NOTICES TO MARINERS is（）. ["Reprints of Radio Navigational Warnings","Amendments to Admiralty Sailing Directions","Amendments to Admiralty Lists of Lights and Fog Signals","Amendments to Admiralty List of Radio Signal"]
银行汇票签发成功后，系统会联动登记（）。 ["银行汇票未结清登记簿","银行汇票退票登记簿","银行汇票撤销登记簿","银行汇票查询\/查复登记簿"]
清晰指明了一国出口货物和服务的去向和进口货物、服务的来源的指标是（）。 ["对外贸易货物结构","国际贸易货物结构","对外贸易地理方向","国际贸易地理方向"]
丙纶丝过滤机是钢衬胶的密封式过滤器，直径1600mm，内部的花板、芯子等也是钢衬胶的，内部的压缩空气环管为（） ["白钢管","铁管","铜管","铅管"]
无合法来源的进口货物、物品，是指未能提供（）等合法来源证明的进口货物、物品。 ["进口手续","合法经销单位的发票","合法的行政处罚决定书","托运清单、运费单"]
真空低的原因有哪些？
