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更多“氧中毒（oxygen intoxication)”相关的问题
第7题
高氧空气水肺装备（气瓶除外）的一般建议是（）
A．必须被评定为【高氧空气清洗】等级B．氧气含量超过40%的高氧空气所使用的装备，必须符合【适氧服务规定】（Oxygen Service Specification）C．调节器必须是用左手的D．以上皆非
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第8题
Mr. Brown is 102 years old. He is leading a full and active life. Why has he【21】so long？ M
any【22】would like to know the answer to the question. They are studying groups of old people all over the world and try to find why some very old people remain healthy【23】and spirit (精神) while【24】be come weak and iii in their 60s. They have observed, first of all, that doing【25】work is a way of life for all these long-lived people. They began their long days of physical labor【26】children and never seem to stop. Second, all these people come from【27】. The air has【28】oxygen (氧) and is pollution free,【29】makes the hearts stronger. Third, these people eat little animal meat. They like to have fresh vegetables, nuts (坚果) , grains, and【30】They never eat more food than their bodies need.
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(46)
A．been
B．worked
C．stayed
D．lived
第9题
ldentity a true statement about the intensity of an exercise actvity.请指出下列容项关于训练活动强度的陈述是正确的()。
A.a The intensity range for a moderate exercise actity is usually over 80 percent Of the oxygen uptake reserve中等强度运动的强度范围通常超过得氧量储备的80%。
B.b. The intensity of cardiovascular exercse is identifed by calculating heart rate.心肺训练的强度是通过心率计算来确定。
C.An exercise activily of moderate intensity results in exhaustion for an average untrained healthy adult中等强度的运动会让个末经训练的普通健康成年人筋疲力尽。
D.An exercise intensity of less than 60 percent is required for improvements in overall fitness and conodtoning为了改善整体体能和身体状况，要求运动强度低于60%.
