概率分析是通过研究各种不确定因素发生不同幅度变动的概率分布及其（）作出某种概率描述，从而对方案的风险情况作出比较准确的判断。
A．对方案经济效果的影响
B．对方案的净现金流量
C．对方案的社会效益
D．对方案的经济效果指标
E．对方案的不确定因素分析
参考答案：A, B, E
解析：
概率分析是通过研究各种不确定因素发生不同幅度变动的概率分布及其对方案经济效果的影响，对方案的净现金流量及经济效果指标作出某种概率描述，从而对方案的风险情况作出比较准确的判断。
| 阅读下面短文，根据短文内容，补全表格中所缺的信息。 | ||||||||
| Let's go hiking! Most people enjoy hiking. Hiking is not only a healthy but also a relaxing activity. The reason why people go hiking is different from person to person. Here are some of the most popular reasons for people to hike: First of all, hiking is very good exercise which will improve people's body. It's good exercise that doesn't hurt your body. Secondly, hiking is simple and cheap. All you need to do is to wear a pair of hiking boots and your smile to start. Finally, hiking is the best way to get away from your everyday life. You could hike alone or go with your friends. After hiking, you will have a clear mind and then return to work with confidence. So why not plan your hiking route right away? | ||||||||
The reasons why hiking is 1______.
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