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问题 单项选择题

在下列四种不确定型决策方法中，比较合理、常用的两种方法是（）

A.保守法和乐观法

B.乐观法和等概率法

C.保守法和等概率法

D.保守法和乐观系数法

答案

参考答案：D

补全对话，情景问答
对话配对。
( ) 1. Is she your sister?                      
( ) 2. Are there any students in the classroom?  
( ) 3. Where is the teacher's office?            
( ) 4. Is the gym next to the library?          
( ) 5. Are those your friends?                   		A. Yes, there are.              
B. Yes, they are.              
C. No, she isn't.              
D. Yes, it is.                  
E. It's next to the science lab.
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选择题

She is planning on hiking. Let's help her _____  some good ideas.[ ]

A. look up      

B. make up      

C. use up          

D. come up with  

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