[求助]几道题大家帮忙解释一下 revenue, demand, product, supply

woojooda

For a firm that holds all other resource inputs constant, a curve depiciting the marginal revenue product of a resource will be:

A. the mirror image of the supply of the firm's demand curve for the resource.

B. identical to the firm's supply curve of the final product

C. identical to the firm's demand curve for the resource

D. the mirror image of the firm's supply curve of the final product.

此题答案为C，但是我想知道D错在哪里？

Which of the following is most likely to cause an decrease in the demand for a specific type of labor?

A. A decrease in the number of workers who specialize in that type of labor

B. An increase in the demand for final goods or services they produce

C. A decrease in the price of machines that are subsititutes in production for that type of labor

D. An increase in the productivity of workers who specialize in doing that type of labor

此题答案为C，但是D错在哪里？

胡老师

the mirror image of the firm's supply curve of the final product的话，这根曲线横坐标是有交点的，而需求曲线不应该有交点的。

第二题目D的话应该是增加对劳动的需求，而不是减少需求。劳动率提供，对劳动需求增加。

woojooda

谢谢老师