【单选题】一件毛衣定价 99元而不是100元;一个面包定价4.8元而不是5元;一块香皂定价是3.98元而不是4元,这种定价方法被称为( )
【判断题】备用电源自动投入装置工作时,当备用电源无压时,备自投装置不应动作。( )
【单选题】备用电源自动投入装置,应保证在设备( )断开后自动投入备用电源。
【简答题】Talia ______ (be) a researcher for about a year. Since she started her job at Newsline, she and her co-worker Amy ______ (take) some journalism classes. They think most of their classes are ______ (in...
【单选题】一件毛衣定价99元而不是100元;一个面包定价4.8元而不是5元;一块香皂定价是3.98元而不是4元,这种定价方法被称为( )