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【单选题】
预防急性胰腺炎发生中，主要措施是（）A.
防止胆道疾病的发生
B.
经常服用磺胺药和抗生素
C.
经常服用消化酶类药物
D.
注意饮食卫生
E.
积极治疗十二指肠疾病
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举一反三
【单选题】Average variable cost is:
A.
variable cost per unit multiplied by quantity.
B.
total variable cost divided by quantity.
C.
the difference between average total cost and total cost.
D.
the difference between total cost and total fixed cost.
【单选题】With mixed costs, the fixed cost element is viewed as the ________ and the variable cost element is viewed as the ________.
A.
step cost; cost of capacity
B.
cost of capacity; incremental cost of using capacity
C.
variable cost; cost of capacity
D.
step cost; mixed cost
【单选题】An increase in total variable cost usually indicates:
A.
a. the cost-driver activity level is decreasing
B.
b. the cost-driver activity level is increasing
C.
c. variable costs per unit is decreasing
D.
d. variable costs per unit is increasing
【简答题】可变成本(variable cost)
【单选题】Average variable cost is the ratio of:
A.
. total cost to the marginal cost.
B.
. variable inputs to fixed inputs.
C.
. variable cost to the quantity of output.
D.
. fixed costs to variable cost.
【单选题】erage variable cost is:
A.
variable cost per unit multiplied by quantity.
B.
total variable cost divided by quantity.
C.
the difference between average total cost and total cost.
D.
the difference between total cost and total fixed cost.
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