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【单选题】
已知产量为100单位时,总成本是300元,产量增加到150单位时,平均成本等于3.5元,在产量变化的范围内,边际成本( )。
A.
随着产量的增加而上升,且数值小于平均成本
B.
随着产量的增加而上升,且数值大于平均成本
C.
随着产量的增加而下降,且数值小于平均成本
D.
随着产量的增加而下降,且数值大于平均成本
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参考答案:
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【判断题】设p是素数,则φ(p)=p。()
A.
正确
B.
错误
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【单选题】听力原文:M: What shall we have for lunch? W: Is there any chicken soup left? Q: What does the woman mean? (19)
A.
She would like some soup.
B.
She's inviting the man to lunch.
C.
She wants to know if the man likes chicken.
D.
She ate lunch earlier.
【单选题】下列不属于老年护理学工作范围的是()
A.
评估老年人的健康和功能状态
B.
老年护理的工作地点在家庭
C.
提供有效护理和其他卫生保健服务,并评价结果
D.
保持老年人的尊严和舒适直至死亡
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