题目内容
Aging poses a serious challenge to OECD countries.And early retirement places an unsustainable burden on (62) financing. There is no easy (63) to this problem, but delaying retirement could help.Retiring early has become so ingrained (根深蒂固的) in OECD countries that these days it is almost an individual professional (64) . It is even possible to drum (65) economic arguments in its favor: retirees spend money (66) save it, for instance, and are valuable for such sectors as tourism. Retiring early, some argue, frees up jobs for younger recruits and helps to (67) productivity. To many, retirement is a hard-earned right, and (68) the earlier the better.All very well, but the reality is quite (69) . Early retirement may seem like a worthy individual goal, but it is a socially (70) one, and, as far as public pensions are concerned, quite unsustainable. The (71) reason is that more people are retiring early and living longer. That (72) more retirees depending on the funding of those in work for their income. The (73) is worrying. In the next 50 years, low fertility rates (出生率) and rising life expectancy (平均寿命) in OECD countries will cause this old-age dependency rate to rise 74 in size. Public pension payments, which pay 30-80% of total retirement incomes in OECD countries, are expected to rise, (75) average, by over 3% percentage points in GDP and by 8% points in some countries. Such is the (76) on pension funds that there is a danger of today’s workers not getting the pensions they (77) or felt they paid for.Action is needed, (78) simply aiming to reduce the generosity (and cost) of public pensions, or trying to augment (扩大) the role of privately funded pensions within the system, though necessary steps, may be insufficient to deal with the dependency (79) . After years of advancing early retirement schemes to (80) redundancies and higher unemployment, many governments are now looking at (81) people to stay in work until they are older. Surely, the thinking goes, if we are healthier now and jobs are physically less strenuous (费劲的) and unemployment is down, then perhaps the present rate should rise anew. 71（）
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金融期货交易所是专门从事金融商品期货交易的场所，它是一个无形的市场。( )
Drugs have been a part of the American story since the very first day Columbus landed in the New World. The Taino Indians (36) Columbus with a gift of tobacco, which would go on to become one of the most important drugs in our history. And if drugs have existed since the beginning, so have drug problems. And so have (37) to solve those drug problems.Since the 19th century when Americans first discovered new (38) drugs like heroin and cocaine, the whole society has (39) the problem of drug abuse and (40) When the 20th century began, the United States— (41) with its first drug epidemic — gradually set up (42) restrictions: at home through domestic law (43) and overseas by starting a world movement to limit opium and coca crops. (44) . The first epidemic was forgotten.During the 1960s, drugs like marijuana and psychedelics came on the scene, and a new generation embraced drugs. (45) . In 1973, the U.S. Drug Enforcement Administration was created to enforce federal drug laws. In the 1970s, cocaine reappeared. Then, a decade later, crack appeared, spreading addiction and violence at epidemic levels.Today, the DEA’s biggest challenge is the dramatic change in organized crime. (46) 46（）
Th1源细胞因子，同时也是巨噬细胞活化因子
2002年9月21日上午10点，张三家修缮房屋，李四应张三的邀请来张三家帮助做杂事。张三先安排李四朝房顶上泥，后又安排李四做饭。李四进入伙房时，一根水泥房梁断裂下落，砸在李四身上，致其右尺桡骨双骨折和右腿腓骨双骨折，住入医院治疗50天，花医疗等费用共计五千多元。张三为李四支付了该笔费用。李四出院后，又因骨折伤未完全治愈，于2001年11月再次住院治疗，又花费医疗费5000余元。经法医检验：李四右尺桡骨双骨折，治疗后遗留右腕关节右前骨功能部分受限的症状，功能丧失约50%以上；右腿腓骨双骨折，经治疗未留下后遗症。李四要求张三支付第二次治疗费和今后的部分生活费，张三不允。李四于是想到法院告张三，但由于身体不好，老跑不方便，便找来其堂兄李六说："打官司的事我不太懂，我委托你帮我打官司吧。"李四为李六书写了委托授权书，为了方便简单起见，李四在授权书上写明"由李六全权代理。"在一审中，李六认为张三经济也不宽裕，于是放弃了要张三支付李四后部分生活费的诉讼请求。法院于2004年4月2日做出了判决，判决书仅要求张三支付李四第二次住院治疗的费用。李四于2004年4月5日收到判决书，他非常气愤，决定亲自上诉。2004年4月9日，李四准备去上诉，但在去车站乘车路中一不小心摔下6米深的山沟，造成右腿骨折，住院治疗15天。2004年5月10日，李四寄出上诉状。 李四的上诉是否有效为什么
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