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Sauna Ceremonial bathing has existed for thousands of years and has many forms, one of which is the sauna. The Finns have perfected the steam bath, or sauna, which may be taken, usually in an enclosed room, by pouring water over hot rocks or as dry heat bath. The Japanese, Greeks, Turks and Russians as well as Native Americans have forms of the sweat bath in their bathing rituals. Dry heat and steam baths had advocates in ancient Rome and pre-Columbian Americans used sweat lodges. The earliest saunas were probably underground caves heated by a fire that naturally filled with smoke as chimney making was unknown at that time. a fire kept in a fire-pit would heat the rock walls of the cave. After reaching full heat, the smoke was let out of the cave and the stones would retain heat for several hours. A few people today say that the smoke sauna, "svusauna", is the only true sauna experience and that all saunas should have at least a background odor or smoke. Today most saunas use electric stoves, although gas and wood-burning stoves are available. Saunas are relaxing and stress relieving. Those with muscle aches or arthritis may find that the heat relaxes muscles and relieves pain and inflammation. Asthma patients find that the heat enlarges air passageways of the lung and facilitates breathing. Saunas do not cure the common cold but they may help to alleviate congestion and speed recovery time. The body’s core temperature usually rises a 1-2 degrees while in the sauna, thus imitating a slight fever. The regular use of a sauna may decrease the likelihood of getting a cold in the first place. Sauna is goof for your skin as the blood flow to the skin increases and sweating occurs. Adults sweat about 2 lbs of water per hour on average in a sauna. A good sweat removes dirt and grime from pores and gives the skin a healthy glow. The loss in water weight is temporary as the body’s physiological mechanisms will quickly restore proper volumes. The cardiovascular system gets work out as the heart must pump harder and faster to move blood to the surface for heat exchange. Heart rate may increase from 72 beats per minute on average to 100-150 beats per minute. A normal heart can handle these stresses but those with heart trouble wishing to begin to use a sauna should seek a doctor’s advice. The elderly and those with diabetes should check with their doctor prior to beginning to take saunas. Pregnant women should not take saunas, particularly in the first three months. Indeed, everyone just starting out should take short sessions at first to become accustomed to this type of bath.
A．pores are cleaned by sweatB．water is lost by sweatingC．blood moves to the surface for heat exchangeD．the heart pumps harder and faster
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扇区是磁盘存储数据的基本单位，每个扇区的大小一般都是( )字节。
A．80
B．512
C．1000
D．1024
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以下各项属于《汉堡规则》对《海牙一维斯比规则》的修改内容的是：
A．增加了实际承运人的概念
B．扩展了承运人的责任期间
C．将推定过失责任制改为不完全过失责任制
D．增加对于迟延交货赔偿的规定
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要使炉况稳定顺行，操作上必须做到三稳，即风量稳、风压稳、风温稳。
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安全标志按其使用目的可分为()标识。
A.注意
B.提示
C.防火
D.禁止
E.指令
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中国古代人才选拔制度包括( )
A. 察举制B. 公务员考试C. 科举制D. 九品中正制
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反应烷烯比提高产品质量提高装置能耗减少。
A.对 B.错
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电力电缆的功能，主要是传送和分配大功率（）的
A．电流
B．电能
C．电压
D．电势
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急性前壁心肌梗死时出现梗死图形的导联是（）
A. Ⅱ、Ⅲ、aVFB. Ⅰ、aVFC. V 1 、V 2 、V 3D. V4、V5、V6E. I、aVL、V5、V6
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地震波包括体波和面波，面波的传播速度大于体波的传播速度。
A . 正确B . 错误
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2015年12月一级消防工程师考试消防技术实务单选题62答案 ×采用临时高压消防给水系统，经计算消防水泵设计扬程为0.90MPa。选择×水泵时。消防水泵零流量时的压力应为( )MPa之间。 A.0.90～1.08 B.1.26～1.35 C.1.26～1.44 D.1.08～1.26
A.0.90～1.08B.1.26～1.35C.1.26～1.44D.1.08～1.26
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为保证好氧生物膜工艺在处理废水时，能够稳定运行，以下说法中不正确的是______。
A．应减缓生物膜的老化进程
B．应控制厌氧层的厚度，避免其过度生长
C．使整个反应器中的生物膜集中脱落
D．应加快好氧生物膜的更新
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