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Moderate Earthquake Strikes England A moderate earthquake struck parts of southeast England on 28 April 2007, toppling chimneys from houses and rousing residents from their beds. Several thousand people were left without power in Kent County. One woman suffered minor head and neck injuries. "It felt as if the whole house was being slid across like a fun-fair ride," said the woman. The British Geological Survey said the 4. 3-magnitude quake struck at 8:19 a.m. and was centered under the English Channel, about 8.5 miles south of Dover and near the entrance to the Channel Tunnel. Witnesses said cracks appeared in walls and chimneys collapsed across the county. Residents said the tremor had lasted for about 10 to 15 seconds. "I was lying in bed and it felt as if someone had just got up from bed next to me." said Hendrick van Eck, 27, of Canterbury about 60 miles southeast of London. "I then heard the sound of cracking, and it was getting heavier and heavier. It felt as if someone was at the end of my bed hopping up and down." There are thousands of moderate quakes on this scale around the world each year, but they are rare in Britain. The April 28 quake was the strongest in Britain since 2002 when a 4.8-magnitude quake struck the central England city of Birmingham. The country's strongest earthquake took place in the North Sea in 1931, measuring 6.1 on the Richter scale. British Geological Survey scientist Roger Musson said the quake took place on 28 April in an area that had seen several of the biggest earthquakes ever to strike Britain, including one in 1580 that caused damage in London and was felt in France. Musson predicted that it was only a matter of time before another earthquake struck this part of England. However, people should not be scared too much by this prediction, Musson said, as the modern earthquake warning system of Britain should be able to detect a forthcoming quake and announce it several hours before it takes place. This would allow time for people to evacuate and reduce damage to the minimum. Many walls and chimneys were damaged during this quake.（）
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阑尾炎经何种途径引起右侧输卵管炎（）
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煮练用剂有哪些，它们在煮练过程中各起什么作用？
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有机磷中毒所致急性肺水肿，抢救首选（）。
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患者女，74岁，主因“间断胸痛20余年，加重2个月”入院。5年前行冠状动脉造影检查示右冠状动脉完全闭塞，前降支弥漫病变，于前降支近中段植入支架3枚。此后患者仍偶有胸痛发作。2个月前，开始出现活动中胸痛，以饱餐后为著，且症状逐渐加重，活动耐量逐渐降低。既往：原发性高血压史10余年，糖尿病史4年。入院查体：Bp140/70mmHg。双肺呼吸音清，未闻及干、湿啰音。心界不大，心律不齐，可闻及期前收缩约5次/min。肝、脾肋下未及。双踝部轻度可凹性水肿。ECG检查：房性期前收缩二联律。当前适当的处理包括（）（提示：患者术后接受了双重抗血小板治疗，术后第3天发现粪便颜色黑，查粪隐血阳性，血常规示血红蛋白较术前无明显变化。）
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储存成本是企业为采购存货而发生的成本。()
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