NO.PZ2018062003000111
问题如下：
Which of the following statements about labor productivity is most correct?
选项：
A. Measured as labor force/hour.
B. Can be measured directly.
C. Can not be measured.
解释：
B is correct.
Improved technology will increase potential GDP. Labor productivity is measured as output/hour.
考点：Labor productivity
解析：Labor productivity 可以被直接测量，所以B选项正确，C选项错误。
Labor productivity 测量方式是，output/hour，所以A选项错误。
老师课堂上说的好像是y/L （yield/labour？）所以这个labour productivity是这两个公式都可以计算是吗？