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A．求关键路径的方法B．求最短路径的Dijkstra方法C．深度优先遍历算法D．广度优先遍历算法
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资料1：北京京铁有限责任公司(110891××××)订购进口一批热拔合金钢无缝锅炉管(属法定检验检疫和自动进口许可管理商品，法定计量单位为千克)，委托辽宁抚顺辽抚锅炉厂有限责任公司 (210491××××)制造出口锅炉。载货运输工具于2007年4月10日申报进境，次日辽宁龙信国际货运公司(210298××××)持经营单位登记手册和相关单证向大连大窑湾海关申报货物进口。保险费率3‰。
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请根据以上资料，选择以下栏目的正确选项：
“备案号”栏：()。
对象是由对象名、(45)、(46)组成的。
关于抵押对抵押物孳息及代位物的效力，正确的说法是()。
听力原文： President Bush says he will do more to promote trade in Africa and stop the spread of AIDS. VOA's Scott Stearns reports, the president met with three West African heads of state at the White House Thursday and promised to take their issues to next month's meeting of industrialized nations in Europe.
President Bush congratulated the leaders of Ghana, Mali and Senegal for their commitment to democracy and their willingness to send troops on regional peacekeeping missions. The leaders met for more than one hour in the Oval Office for a conversation that focused on promoting democratic gains and boosting foreign investment.
Where will Mr. Bush talk with industrialized nations on South African issues？
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