下列关于极限编程的说法中,不正确的是______。 A) 极限编程的主要优点是可以随时应对新增或改变的需求 B) 极限编程的主要缺点是编码人员的自由度过大 C) 极限编程的单元测试由专门的测试人员完成,编码人员不参与其中 D) 验收测试主要由用户完成
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【单选题】Will, Bill, and Phil decide to study an extra hour for an exam. Instead of studying, they could have gone out to eat, played football, or watched TV. Which of the following statements is correct?
A.
The benefit the three students receive must be the same because they all make the same choice.
B.
The students made a rational choice as long as they face no scarcity.
C.
The students could each have different opportunity costs.
D.
The marginal cost of the decision is the same if they make the same score on the exam.
E.
Going out to eat, playing football, and watching TV are all called sunk costs.
【单选题】The night before an economics test, you decided to attend your friend’s wedding party instead of studying for the test. You received 70% for the test – not the 95% you normally score. What was the opp...