强心苷内酯环开裂,加酸后不可再环合,宜选择() ["A.碳酸氢钠水溶液","B.氢氧化钠水溶液","C.碳酸钠水溶液","D.碳酸氢钾水溶液","E.氢氧化钠醇溶液"]
下列哪些属于基于Intel架构的服务器虚拟化技术() ["Hyper-V","LPAR","Xen","Vmware"]
有关留置权,下列表述正确的是:() ["承运人为取得运费对承运的扶贫物资可行使留置权","保管人为取得保管费对保管的救灾物资可行使留置权","加工人为取得加工费对加工物可行使留置权","财产的侵占人因对该财产支付了修理费,所有人未支付修理费的情况下,侵占人可行使留置权"]
一次性使用集尿袋的尿袋容积允许误差为() ["±5%","±10%","±15%","±20%","±25%"]
()是世界上最早提出消费者权益保护的国家。 ["中国","美国","英国","日本"]
简述出口合同履行的主要阶段。