For a firm in perfect competition, the profit maximizing output is 200 tons at a price of
A. marginal product per unit of labor is 1/3 ton.
B. marginal revenue product of capital is equal to the price of a unit of capital.
C. ratio of the marginal output per labor unit to labor units employed is at a maximum.
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外呼吸是指气体进出()的过程。
A. 肺
B. 支气管
C. 心肺
急救伤重病人时()给伤病员口服任何东西。
A. 根据病情
B. 可以
C. 不可以
我国对烧伤病人的评估分为()度。
A. 3
B. 4
C. 5
现场急救是指在救护车(120)达到(),给予伤病员的治疗和救助。
A. 现场
B. 之前
C. 之后