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采18层办公楼，建筑面积32000m2，总高度71m，钢筋混凝土框架一剪力墙结构，脚手架采用悬挑钢管脚手架，外挂安全网，塔式起重机作为垂直运输工具，2010年11月9日在第十五层结构施工时，吊运钢管时钢丝绳滑扣，起吊离地20m后，钢管散落，造成下面作业的4名人员死亡，2人重伤。 经事故调查发现： （1）作业人员严重违章，起重机司机因事请假，工长临时指定1名机械工操作塔式起重机，钢管没有捆扎就托底兜着吊起，而且钢丝绳没有在吊钩上挂好，只是挂在吊钩的端头上； （2）专职安全员在事故发生时不在现场； （3）作业前，施工单位项目技术负责人未详细进行安全技术交底，仅向专职安全员口头交代了施工方案中的安全管理要求。 对本起事故，专职安全员有哪些过错？
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举一反三
【单选题】下列方法中,可用于鉴别羊、猪和牛布鲁菌的是
A.
初次分离培养需5%~10%的CO2
B.
是否分解乳糖
C.
菌体A抗原与M抗原的比例
D.
是否分解葡萄糖
E.
血琼脂平板是否溶血
【单选题】听力原文：W：It's a pity you missed the concert last night．It was wonderful． M：I didn't want to miss the basketball game．Well，I'm not a classical music fan anyway． Q：What do we learn from the conversation? ...
A.
The man went to see a film, but didn't like it.
B.
The man was sorry to miss the NBA game.
C.
The man is more interested in the basketball game than in classical music.
D.
The man was sorry that he didn't see a film.
【单选题】听力原文：M: I'm really sorry I didn't make it to your dinner party last night, Julie. W: It's all fight to say that now, but we wasted half the evening waiting for you to turn up. Q: What do we learn abou...
A.
She was considerate.
B.
She was unforgiving,
C.
She was apologetic.
D.
She was sympathetic.
【简答题】弧焊变压器的短路电流靠____来限制。
【简答题】Tony: I(1) ______ to hear why you haven't finished this story yet. Talia: I(2) ______ trouble finding out the truth. I(3) ______ not turn it in until it's ready. Tony: I don't know (4) ______ who thin...
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