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第一章 单元测试
1、 The purpose of break-even analysis is to determine the number of units of a product to sell or produce that will equate total revenue with total cost. At the break-even point, the profit is ( ) zero.
A:more than
B:less than
C:equal to
答案: equal to
2、 In general, an increase in variable costs will（ ）the break-even point, all other things held constant.
A:increase
B:decrease
C:not change
答案: increase
3、 It’s important to make full use of techniques in management science process, which techniques are commonly used for the purpose of decision-making（ ）?
A:Linear programming models
B:Decision analysis
C:Transportation and assignment
D:Project management (like CPM/PERT)
答案: Linear programming models
Decision analysis
Transportation and assignment
Project management (like CPM/PERT)
4、 Manufacturing companies develop linear programming models to help decide how many units of different products they should produce to maximize their profit (or minimize their cost), given scarce resources such as capital, labor, and facilities. ( ）
A:对
B:错
答案: 对
第二章 单元测试
1、 If the graphical method is used to solve the linear programming problem, the number of decision variables should be ( ).
A:2
B:≥3
C:≤5
D:No limitation
答案: 2
2、 In the linear programming model, ( ) restrict the decision variables to zero or positive values.
A:Objective function
B:Resource requirements
C:The features of variables
D:Nonnegativity constraints
答案: Nonnegativity constraints
3、 If the optimal solution of the linear programming problem is reached at two vertices of feasible domain at the same time, then the optimal solution has ( ).
A:Two solutions
B:A line segment connecting two vertices
C:A straight line connecting two vertices
D:It’s impossible
答案: A line segment connecting two vertices
4、 The following features of standard form of Linear programming are correct（ ）.
A:The decision variables are not equal to zero
B:There is no limit to the symbol of decision variables
C:The decision variables are nonnegative
D:None of above is true
答案: The decision variables are nonnegative
5、 The optimal solution of the linear programming problem must be the feasible solution. （ ）
A:对
B:错
答案: 对
第三章 单元测试
1、
Given that a linear programming problem is as following, the optimal solution of dual problem is ( ).
A:Y= (1,0,3/5,4/5)
B:Y= (4/5,3/5,1,0)
C:Y= (0,3/5,4/5,1)
D:Y= (0,3/5,1,4/5)
答案: Y= (4/5,3/5,1,0)
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