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低碳钢含碳量低，固态相变的组织主要是（）+少量珠光体。
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男性，48岁。吞咽困难1个月。30年前曾因"胃溃疡穿孔"行胃大部切除术。上消化道X线造影：食管中段长3cm充盈缺损伴管腔狭窄，黏膜破坏。代食管的器官首选（）。
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电力电缆在以下部位应穿管保护：（）
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俯视图是由（）投射所得的视图，它反映形体的前后和左右方位，即（）方向。
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一般要求轻载调整装置的调整裕度是（）。
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女，18岁。车祸伤后胸痛、腹痛、呼吸困难3小时急诊入院。体检：左下胸壁塌陷、压痛，可扪及皮下气肿，左上腹压痛、反跳痛。胸片示左侧血气胸并膈疝。首先应进行下列哪项处理（）
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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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酒店客房库房主要存放的物品有棉织品、客用品、清洁工具、清洁剂、办公用品等五大类，做好日常的管理工作有利于提升工作效率，以下对库房物品管理，理解正确的是哪项？（）
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带宽型差异化业务电路有（）种模式的服务指标。
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外感所致腰痛，总离不开下列哪种邪气为患（）