单项选择题
Which of the following probably will not be a long run result of automation
A．Industrial expansion.
B．An increase in employment.
C．Displacement of labor from one industry to another.
D．An increase in unemployment.
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单项选择题
A characteristic of the Second Industrial Revolution is______.
A．less electronic control of productive machinery
B．a decrease in the necessity for human effort in production
C．a reduction in leisure time
D．a lower standard of living
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