拉格朗日乘子法是求解等式约束优化问题的一种经典方法，它是一种（ ）
A. 降维法
B. 消元法
C. 数学规划法
D. 升维法
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二维目标函数的无约束极小点就是（ ）。
A. 等值线族的一个共同中心
B. 梯度为0的点
C. 全局最优解
D. 海塞矩阵正定的点
The personal satisfaction people feel when they have done a job well is a(n) ________ reward.
A. cognitive
B. extrinsic
C. physiological
D. intrinsic
The Hawthorne studies found that employees in the experimental group
A. performed much better under bright lighting than they did when lighting was dim.
B. were more productive than other employees regardless of the level of lighting.
C. were more creative when working individually than they were when working in teams.
D. performed poorly because they were distracted by all of the attention they received.
Abraham Maslow thought that once needs at one level of his hierarchy were met:
A. motivation would diminish.
B. another, higher-order need would emerge to motivate that person.
C. that type of need would never again be an effective motivator.
D. he or she would become more interested in lower-level needs.
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