（ ） service has no fixed itinerary or schedule andis operated on any route according to supply and demand of the shipping market.

[单选题]（ ） service has no fixed itinerary or schedule and isoperated on any route

[主观题]市场供给表（Market supply schedule）

[名词解释] 市场供给表（Market supply schedule）

[主观题]Short－run aggregate supply schedule 短期总供给表

[名词解释] Short－run aggregate supply schedule 短期总供给表

[单选题]According to Gencon，if at any time during the currency of this Charter，both Owners and Charterers are unable to arrange bunkers at the main bunkering ports for the voyage in question，the（）to have the privilege of canceling this Charter.A . Charterers

[单选题]（）has three specific points: fixed line and announcing shipping time in advance.A . liner transportB . line shipC . line containerD . line

[单选题]（）has three specific points: fixed line, fixed ports and announcing shipping time in advance.A . Liner transportB . Line shipC . Line containerD . Line

[单选题]A．ccording to the passage, ______ has become the driving force for the development of telephone system?A．information technologiesB．InternetC．PCD．convergence of telecommunications technologies

[单选题](A popular service that has attercted the interest of companies and has home users alike is the sending of voice signals over an IP-based network, such as the Internet. The practice of making telephone calls over the internet has had a number of diff