65. Correctly measuring the productivity of service workers is complex. Consider, for example,postal workers: they are often said to be more productive if more letters are delivered per postal worker. But is this really true? what if more letters are lost or delayed per worker at the same time that more are delivered? The objection implied above to the productivity measure described is based on doubtsabout the truth of which of the following statements?这个问题如何翻译，我总是翻不好，请牛人指教！！！作者: 回家过年 时间: 2003-6-8 10:48
65。从上文中得出的关于生产力考察的反对意见是基于对下面哪项正确的怀疑？
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