【单选题】As shown in the picture, it is an ideal operational amplifier circuit, the out put voltage over the value of the input current source uo/is__________. Choose A,B,C or D.
【单选题】As evidence, Brynjolfsson and McAfee point to a chart that only an economist could love. In economics, productivity— the amount of economic value created for a given unit of input, such as an hour of ...