问题
单项选择题
下列风险连续型概率分布中，（）的特点是密度函数为在最大值两边不对称分布，适用于描述工期等不对称分布的输入变量。
A.正态分布
B.三角形分布
C.β分布
D.经验分布
答案
参考答案：C
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下列风险连续型概率分布中，（）的特点是密度函数为在最大值两边不对称分布，适用于描述工期等不对称分布的输入变量。
A.正态分布
B.三角形分布
C.β分布
D.经验分布
参考答案：C
| 从方框中选择适当的词或短语完成句子 | |
| |
| 1. He stood up, dropped his____on the floor, and disappeared. 2. She walked_____the door. 3. She_____to show that she agreed with me. 4. He wanted to____early in order to get there on time. 5. The cheapness of____travel is its only advantage. 6. The____of the train was delayed. 7. ____ the bus when you get there. 8. ______rolled down his face. 9. ______ they may not succeed, they will still try. 10. He goes to Europe by_____. |