单项选择题

According to the passage, the decisive factor in maintaining a firm's competitive advantage is ________.

A．the introduction of new technologies
B．the improvement of workers' basic skills
C．the rational composition of professional and managerial employees
D．the attachment of importance to the bottom half of the employees
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单项选择题
What's the main idea of the passage
A．American firms are different from Japanese and German firms in human-resource management.
B．Extensiving retraining is indispensable to effective human-resource management.
C．The head of human resource management must be in the central position in a firm's hierarchy.
D．The human resource management strategies of American firms will affect their competitive capacity.
单项选择题
What does we have been 'twindling the knobs' for decades mean
A．We have been changing the climate with thoughtless actions for decades.
B．We have been handling machines with poor skills for decades.
C．We have been following a misleading chapter about the earth for decades.
D．We have been mistaken in the belief in developing the agricultural infrastructure.
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