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由于题目中出现了具体的单词the telephone exchange ,所以定位,At the empirical level Clark shows how a change at the telephone exchange from maintenance-intensive electromechanical switches to semi-electronic switching systems altered work tasks, skills, training opportuni-ties, administration, and organization of workers. 因此可以发现the telephone exchange 有巨大的影响,因此 C。 |
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