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问题描述：

[单选] 风险是指发生特定危险事件的可能性与危害程度的结合。（）
A．正确 B．错误
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答案解析：无
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上一篇：事故是指造成死亡、伤害、财产损失的意外事件（）。 下一篇：危险、有害因素是指可能导致伤害、疾病、财产损失、环境破坏的根源或状态。（）

随机题目

化学品安全标签是掌握和了解化学品安全技术性能的综合性资料。（）
管理控制是按照国家法律和标准以及企业规定建立起来的管理程序和措施，是预防化学品危害的一个重要方面。（）
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采取改变工艺，隔离危险源，实施有效的通风往往成为最直接、最有效的预防化学危害的手段。（）
C A taxi hit a truck． A policeman spoke to the taxi driver and to the truck driver． He also spoke to Tom． He was a witness （目击者）． This is what they said． TRUCK DRIVER: I was driving from the airport to Newton． A car crossed the road， so I slowed down． I did not stop． A taxi hit the back of my truck． Nobody was seriously hurt but both cars were damaged（受损害）． TAXI DRIVER: I was driving behind a truck a few kilometers from Newton． The truck stopped suddenly． The driver did not give me a warning （警告）． I was driving very slowly． I could not pass the truck because there were two cars coming near from Newton． My taxi hit the truck， and some glass cut my left hand． TOM: I was watching the traffic about a kilometer from the airport． A truck was going to Newton． It was not going very quickly． There was a taxi about two hundred meters behind the truck． It was going fast． When the truck slowed down， the taxi hit it． The taxi driver was not looking at the truck． He was looking out of the window at something． My friend saw the accident， too． Tom"s friend spoke to the policeman and agreed with Tom．11． How many people are mentioned （提到） in the story？
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