当公共物品用既定的生产成本生产出来后，增加消费者数量需要额外增加成本。（）
参考答案：错
The nurse is assessing a client who gave birth yesterday. Where should the nurse expect to find the top of the client's fundus ？（）
A．One fingerbreadth above the umbilicus.
B．One fingerbreadth below the umbilicus.
C．At the level of the umbilicus.
D．Below the symphysis pubis.
