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2014年4月11日，上海证券交易所发布公告，终止中国长江航运集团南京油运有限公司股票（*长油）交易资格。这意味着已连续四年亏损的*长油终于退出股票市场，持有该股票的股民也因此不同程度地受到损失。*长油退市事件的警示是（ ）①上市公司应努力改善治理结构，着力提高资本使用效益②上市公司应不断调整资本结构，尽力降低股市融资水平③投资者应保持理性，越是经营不善的公司投资风险越大④投资者应承受风险，风险越大的公司其投资收益率越高
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Paragraph 3（）
简述队列研究中暴露与疾病关联强度的指标及其意义。
简述影响诊断试验可靠性的因素有哪些？
第三篇Trying to Find a Parther One of the most striking findings of a recent poll in the UK is that of the people inbterviewed,one in two believes that it is becoming more difficult to meet someone to start a family with. Why are many finding it increasingly difficult to start and sustain intimate relationshipsDoes modern life really make it harder to fall in loveOr are we making it harder for ourselves It is certainly the case today that contemporary couples benefit in different ways from relationships.Women no longer rely upon partners for economic security or status.A man doesn’t expect his spouse to be in sole charge of running his household and raising his children. But perhaps the knowledge that we can live perfectly well without a partnership means that it takes much more to persuade people to abandon their independence. In theory,finding a partner should be much simpler these days.Only a few generations ago,your choice of soulmate (心上人) was constrained(限制) by geography,social convention and family tradition.Although it was never explicit,many marriages were essentially arranged. Now those barriers have been broken down.You can approach a builder or a brain surgeon in any bar in any city on any given evening.When the world is your oyster (牡蛎),you surely have a better chance of finding a pearl. But it seems that the old conventions have been replaced by an even tighter constraint:the tyranny of choice. The expectations of partners are inflated(提高) to an unmanageable degree:good looks,impressive salary,kind to grandmother,and right socks.There is no room for error in the first impression. We think that a relationship can be perfect.If it isn’t,it is disposable.We work to protect ourselves against future heartache and don’t put in the hard emotional labor needed to build a strong relationship.Of course,this is complicated by realities.The cost of housing and child-rearing creates pressure to have a stable income and career before a life partnership. What does the recent poll show （）
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