正确答案: A

事件树 事故树 因果树 安全树

题目：（ ）是一种描述事故因果关系的有方向的“树”，是安全系统工程中的重要的分析方法之一。

解析：事故树是从结果到原因描绘事故发生的有向逻辑树。它形似倒立着的树，树中的节点具有逻辑判别性质。

查看原题 点击获取本科目所有试题

举一反三的答案和解析：

[多选题]事物发展中矛盾力量的不平衡性原理的方法论意义是

坚持“两点论”和“重点论”的统一

坚持“两点论”，反对“一点论”

坚持“重点论”，反对“均衡论”

重视重点和非重点的相互区别

解析：ABCD

[单选题]

lastB． move

解析：答案：A

[单选题]Text 4In 1960—1961, Chad (乍得) harvested 98,000 tons of cotton for the first time in its history, and put out the flag a little too soon. The efforts of the authorities to get the peasants ' back' to work, as they had slacked off a great deal the previous year during independence celebrations, largely contributed to it. Also, rains were well spaced, and continued through the whole month of October. If the 1961—1962 total is back to the region of 45,000 tons, it is mostly because efforts slackened again and sowing was started too late.

both A and B

解析：答案：D