题目内容
×年×月×日下午，D县正在建设的某大桥发生坍塌事故，造成29人死亡，22人受伤，直接经济损失3974.7万元。 经调查认定，这是一起严重的责任事故。由于施工、建设单位严重违反桥梁建设的法规标准、现场管理混乱、盲目赶工期，监理单位、质量监督部门严重失职，勘察设计单位服务和设计交底不到位，县政府及省交通厅、公路局等有关部门监管不力，致使大桥主拱圈砌筑材料未满足规范和设计要求，拱桥上部构造施工工序不合理，主拱圈砌筑质量差，降低了拱圈砌体的整体性和强度，随着拱上施工荷载的不断增加，造成1号孔主拱圈靠近0号桥台一侧3～4m宽范围内，砌体强度达到破坏极限而坍塌，受连拱效应影响，整个大桥迅速坍塌。 根据以上内容回答下列问题。 简述事故预警的目标、任务和特点，一个完整的预警管理体系怎样构成
查看答案
搜索结果不匹配？点我反馈
更多问题
Imagine eating everything delicious you want - with none of the fat. That would be great, wouldn’t it New "fake fat" products appeared on stone shelves in the United States recently, but not everyone is happy about it. Makers of the products, which contain a compound called olestra, say food manufacturers can now eliminate fat from certain foods. Critics, however, say the new compound can rob the body of essential vitamins and nutrients (营养物) and can also cause unpleasant side effects in some people. So it’s up to consumers to decide whether the new fat-free products taste good enough to keep eating. Chemists discovered olestra in the late 1960s, when they were searching for a fat that could be digested by infants more easily. Instead of finding the desired fat, the researchers created a fat that can’t be digested at all. Normally, special chemical in the intestines (肠) "grab" molecules of regular fat and break them down so they can be used by the body. A molecule of regular fat is made up of three molecules of substances called fatty acids. The fatty acids are absorbed by the intestines and bring with them the essential vitamins A, D, E and K. when fat molecules are present in the intestines with any of those vitamins, the vitamins attach to the molecules and are carded into the bloodstream. Olestra, which is made from six to eight molecules of fatty acids, is too large for the intestines to absorb. It just slides through the intestines without being broken down. Manufacturers say it’s that ability to slide unchanged through the intestines that makes olestra so valuable as a fat substitute. It provides consumers with the taste of regular fat without any bad effects on the body. But critics say olestra can prevent vitamins A, D, E and K from being absorbed. It can also prevent the absorption of carotenoids (类胡萝卜素), compounds that may reduce the risk of cancer, heart disease, etc. Manufacturers are adding vitamins A, D, E and K as well as carotenoids to their products now. Even so, some nutritionists are still concerned that people might eat unlimited amounts of food mad with the fat substitute without worrying about how many calories they are consuming. The result of the search for an easily digestible fat turned out to be ______.
（1～5题共用题干）患者，男性，70岁，因“反复右上腹痛一年”入院，拟行胆囊切除术。 患者行IPPV通气时，突然出现发绀、SpO2下降、双侧胸廓运动不佳、听诊一侧呼吸音消失，最可能的原因是（）
2010年8月16日上午9时40分，A有限公司(烟花爆竹企业)在违法组织生产时发生爆炸，引起部分厂(库)房连续爆炸，附近2km范围内建筑物玻璃被振碎，5km范围内有振感。事故还引发相邻的木材厂发生火灾。截至8月19日，事故已造成20人死亡、4人失踪、153人受伤入院治疗(其中14人重伤)。 事故发生后，党中央、国务院领导同志高度重视，立即作出重要批示，要求有关部门立即核实情况，认真指导开展救援工作，全力抢救受伤人员，严防次生事故发生。省政府和国家安全监管总局有关负责同志迅速赶赴现场，指挥、指导事故抢险救援、现场处置、伤员救治、事故调查和善后等工作。 根据以上内容，回答下列问题： 根据《企业职工伤亡事故调查分析规则》的规定，与事故发生的有关事实包括什么
Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. Why is it difficult to predict the weather for in advance for Autumn
微信支付 
支付宝支付