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【简答题】
听下面一段材料，回答第1至3题。 1. What happened when the man was climbing the mountain? [ ] A. He got trapped in a cave. B. He got lost in bad weather. C. He lost his equipment and food. 2. What caused the loss of the man's legs? [ ] A. Low temperature. B. A bad fall in the mountain. C. An unsuccessful operation. 3. What did he decide to do after losing his leg? [ ] A. Design new climbing shoes. B. Set up a club for the disabled. C. Use technology to fight his disability.
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【简答题】某事故树有割集3个,分别为{X1,X2},{X1,X3},{X2,X3,X4},其中结构重要度最大的基本原因事件为____。
【简答题】某事故树的割集有6个,分别为{X1,X2,X2 },{X1,X2,X4},{X3,X4},{X2,X4},{X1,X2,X3}和{X3},则该事故树的最小割集有____个。
【判断题】某事故树有五个割集,分别为{ X 1 ,X 4 } 、{ X 2 ,X 3 ,X 4 } 、{ X 1 ,X 3 ,X 3 ,X 4 } 、{X 2 } 和{X 1 ,X 3 } ,该事故树最小径集的数目为3个。
A.
正确
B.
错误