If the production costs rise and the selling price remains the same, the profit margin will increase.
查看答案
To achieve economies of scale it is necessary to increase production.
A. 对
B. 错
Economies of scale are achieved because unit costs fall as production increase.
A. 对
B. 错
1.下面哪个不是用例描述()的内容
A. 用例
B. 参与者
C. 关系
D. 对象
2.下面哪步不是用例建模的步骤()
A. 确定业务参与者
B. 构造用例模型图
C. 记录业务需求用例描述
D. 确定具体业务