【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...
D.
More information required to answer the question.
【单选题】下列各项不属于施工安全管理策划安全目标的是( )。
C.
控制和杜绝因公负伤、死亡事故的发生(负伤频率在36‰以下、死亡率为零)
【单选题】对名为file1的文件用chmod 751 file1进行了修改,则它的许可权是( )。
【简答题】求由方程x/y=ln(xy)所确定的隐函数y=y(x)的导数
【单选题】患者男,67岁。晚期尿毒症。近来病情加剧,情绪发生改变,经常乱发脾气,患者要求停止治疗,怨恨家属照顾欠周,对医护人员百般刁难,此心理属于
【简答题】求y=ln|f(x)|的导数,其中,f(x)可导,f(x)≠0.
【多选题】下列选项中说法错误的是( )。
C.
1643年至1648年的威斯特伐里亚公会是近代国际法产生的标志
D.
普芬道夫的《战争与和平法》是第一部具有完整体系的国际法著作