猴子中最大的一种是( )
A．黑猩猩
B．狒狒
C．猿猴
D．金丝猴
参考答案：B
When workers agree to forego leisure to undertake labor and receive wages, the term that is applied in labor supply economics is the:（）
A. substitution effect.
B. income effect.
C. marginal rate of substitution.
围绕组织目标制订行动方案，是领导职能的重要内容。 ( )
