【单选题】_____ took me seven days to finish the work. [ ]
【单选题】依据《合同法》第九十二条,合同的权利义务终止后,当事人根据交易习惯履行保密义务,该义务的依据是()
【判断题】铝及铝合金钨极氩弧焊焊接时,常采用直流电源正极性焊接。( )
【单选题】It me seven days to go through the river.
【单选题】钨极氩弧焊焊接铝及铝合金时,常采用的电源及极性是( )。
【单选题】It me seven days to climb the mountain.
【单选题】It me seven days to go through the dark forest.
【单选题】合同的权利义务终止后,当事人根据交易习惯,履行通知、协助、保密等义务,其依据是( )
【单选题】__What a nice dress!It fits you well. __Thank hou. It ___ me seven hundred yuan. I like it's design.
【简答题】合同的权利义务终止后,当事人根据交易习惯,履行通知、协助、保密等义务,其依据是什么原则?