叶克斯——道得生定律表明______与激奋水平的关系。
参考答案：作业效率
It is not how much we do but how much love we put into what we do ________ benefits our work most.[ ]
A. who
B. which
C. that
D. what
强化服务是参与管理的一种表现形式。( )
