【单选题】合理的营养就是要提供有利于人体健康的( )。
【简答题】下列经济业务中,引起会计等式两边同时变化的有( )。
【单选题】If marginal cost is increasing then:
A.
marginal product must be increasing.
B.
average variable cost must be increasing.
C.
average total cost must be increasing.
D.
none of the above must necessarily be true.
【单选题】Theoretically, an increase in the real wag
C.
has an ambiguous effect on leisure.
D.
has no effect on leisure.
【判断题】合理的营养就是提供有利于人体健康的平衡膳食。
【判断题】合理的营养就是提供有利于人体健康的平衡膳食。
【判断题】合理营养就是提供有利于人体健康的平衡膳食。()