多选题:服务业的生产率很难提高,这是因为(  )。

题目内容:
服务业的生产率很难提高,这是因为(  )。 A.服务业是典型的技术密集型行业
B.需要频繁的个性化处理
C.常常需要专业技术
D.常常很难评价质量
E.常常需要机械化和自动化

参考答案:
答案解析:

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