概率分析的过程包括()。A、列出要考虑的各种不确定因素和确定其数值发生变化个数 B、

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题型：多项选择题

问题：

概率分析的过程包括()。

A、列出要考虑的各种不确定因素和确定其数值发生变化个数

B、分别确定各种情况可能出现的概率并保证每个不确定因素可能发生的情况的概率之和等于1

C、分别求出各种不确定因素发生变化时，方案净现金流量各状态发生的概率和相应状态下的净现值NPV等指标值

D、求方案净现值等指标的期望值和方差以及方案净现值等指标非负的累计概率

E、求出离散系数

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完形填空。
You don't have to give thousands of dollars to help someone. Sarah, a girl from Michigan, the USA, makes a difference just by giving her 1 . Sarah was seriously ill 2 she was a baby. It is 3 for her to move. Sarah has to 4 around with a walker. However, the 11-year-old girl doesn't give up; she uses her experience to help others. Last summer, Sarah 5 three days a week for seven weeks at the Grand Rapids Comprehensive Therapy Center. She was one of the youngest 6 for "Therapy (治疗) and Fun", a program for special-needs children. Sarah's job was to help the special-needs children and provide them 7 advice and encouragement (鼓励). Sarah says that she's 8 that she can share her knowledge with others, and that working at the center taught her a lot, too. "I feel my life is getting better because I can help others in 9 way," she said. Mary Van Wingerden, Sarah's fourth-grade teacher, said, "Sarah has the help of other students around her, but she shows them that she's there 10 them also. "
( )1. A. money ( )2. A. when ( )3. A. easy ( )4. A. speak ( )5. A. worked ( )6. A. doctors ( )7. A. with ( )8. A. sad ( )9. A. her ( )10. A. to help	B. house B. after B. interesting B. walk B. lay B. nurses B. to B. glad B. my B. to watch	C. time C. until C. difficult C. listen C. sat C. volunteers C. for C. worried C. your C. to find

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B．三原色是由黑色、白色和红色构成

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