题目：
Marginal revenue product is best defined as the:（）
A. additional output that results from employing one more unit of a productive input.
B. gain in total revenue from selling one more unit of output.
C. addition to total revenue from selling the additional output from using one more unit of an input.
答案：
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参考答案：E解析：片剂制备中可能发生的问题及解决办法
