【单选题】Hearing the ____ story, the little boy had a ____ expression on his face. [ ]
A.
frightening; frightening
B.
frightened; frightened
C.
frightening; frightened
D.
frightened; frightening
【单选题】磁感式传感器上有( )根引线,输出的是( )信号,它( )电源。
【多选题】对于任意两事件A和B,与A∪B=B等价的是______。
【简答题】在电子计算机日益普及和网络飞速发展的新形势下,会计电算化已经成为会计发展的大趋势。( )