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Why do bond portfolio managers use the concept of duration（）
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Two basic assumptions of technical analysis are that security prices adjust:（）
某化工厂的原料、中间产品有火灾、爆炸、中毒的危险性，生产的最终产品有Cl2和代号为CP的其他产品。生产工艺单元有：原料库房、氯气库房、产品CP库房、生产一车间和生产二车间，厂区周围有居民住宅和其他工厂。为此，工厂需编制事故应急预案。为避免重大事故发生，该厂决定编制应急救援预案。 厂长将该任务指派给安全科，安全科成立了以科长为组长，科员甲、乙、丙、丁为成员的五人的厂应急救援预案编制小组。编制小组找来了一个相同类型企业C的应急救援预案，编制人员将企业C应急救援预案中的企业名称、企业介绍、科室名称、人员名称及有关联系方式全部按本厂的实际情况进行了更换，按期向厂长提交了应急救援预案初稿。 厂长李某仔细认真审查了厂事故应急预案，认为：(1)事故应急预案中的“一旦事故发生，全厂员工应优先保护重要生产设备，救助他人”的应急原则，体现了保护企业财产，爱厂如家的奉献精神；(2)“应急救援领导小组组长为主管生产安全的副厂长王某”，体现了谁主管谁负责的原则；(3)“当发生重大氯气泄漏时由场外消防部门向周围居民发出警报”，体现了生产不扰民的原则；(4)“启动事故应急预案后，厂长甲应立即向当地安全生产监管部门、环境保护部门两个部门报警”的报警程序清晰；(5)应急救援物资和设备的评估合理。因此，厂长李某当场就让科长立即将事故应急预案打印发布。 厂长决定进行应急演习，并再次将任务交给科长。科长将演习地点设在氯气库房，厂应急救援指挥部设在氯气库房下风侧的平地上。演习过程为：第一步，指示人员A打开氯气库房中一个装有Cl2的钢瓶，使Cl2缓慢泄漏；第二步，工人B、C在氯气库房外面假装因Cl2中毒而晕倒；第三步，工人D、E发现有人晕倒，立即离开危险区，并向调度室报警；第四步，事故应急预案立即启动，所有应急人员到达指定位置和岗位；第五步，向110、119、120等外部应急救援部门报警；第六步，外部应急救援力量赶到现场，实施人员救护和抢险。 现场演练结束，领导进行了口头总结后，宣布演练结束。 根据以上场景，回答下列问题： 说明此次应急救援演练现场应采取哪些应急措施。
Cody Scott would like to screen potential equity investments to identify value stocks and selects firms that have low price-to-sales ratios. Unfortunately, screening stocks based only on this criterion may result in stocks that have poor profitability or high financial leverage, which are undesirable to Scott. Which of the following filters could be added to the stock screen to best control for poor profitability and high financial leverage Filter 1—Include only stocks with a debt-to-equity ratio that is above a certain benchmark value. Filter 2—Include only dividend paying stocks. Filter 3—Include only stocks with an assets-to-equity ratio that is below a certain benchmark value. Filter 4—Include only stocks with a positive return-on-equity. Poor profitability High financial leverage（）①A. Filter 2 Filter 3 ②B. Filter 2 Filter 1 ③C. Filter 4 Filter 3
Hanson Aluminum, Inc. is considering whether to build a mill based around a new roiling technology the company has been developing. Management views this project as being riskier than the average project the company undertakes. Based on their analysis of the projected cash flows, management determines that the project’s internal rate of return is equal to the company’s marginal cost of capital If the project goes forward, the company will finance it with newly issued debt. Should management accept or reject this project（）
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