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【单选题】
油脂蛋糕的油糖搅拌法是先将()充分搅拌，让油脂中充入大量空气而膨胀。A.
油脂和面粉
B.
油脂和糖
C.
油脂和鸡蛋
D.
面粉和糖
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反馈参考答案：
举一反三
【单选题】When using the moving-average cost formula with a perpetual system,
A.
a weighted-average cost is calculated at year end.
B.
a new unit cost is calculated each time a sale is made.
C.
a new unit cost is calculated each time a purchase is made.
D.
a new unit cost is calculated both when a sale is made and when a purchase is made.
【简答题】When building m______ cost more, the price of houses increases.
【单选题】When marginal cost exceeds average total cost,
A.
average fixed cost must be rising.
B.
average total cost must be rising.
C.
average total cost must be falling.
D.
marginal cost must be falling.
【单选题】Marginal cost is rising when marginal cost is:
A.
positive.
B.
less than average cost.
C.
greater than average cost.
D.
none of these.
【单选题】Marginal cost is equal to average total cost when( )
A.
average variable cost is falling.
B.
average fixed cost is rising.
C.
marginal cost is at its minimum
D.
average total cost is at its minimum
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