【单选题】成人心率每分钟 波动次数为:
C.
60 ~ 100 次,每天搏动 10 万 次左右
【判断题】结构按传力分析特性可分为两大类: 静定结构和静不定结构( )
【单选题】I think that table is ____.
【单选题】It's never easy for a mighty military to tread lightly on foreign soil. In the case of American forces in South Korea, protectors of the nation's sovereignty since the Korean War, the job is made doub...
A.
the massacre of 200 pro-democracy protesters
B.
many tragic outcomes of U. S. Korean cross-country marriage
C.
sexual assaults on Korean prostitutes
D.
American servicemen's behaviour in South Korea
【单选题】一张气泡室照片表明,质子的运动轨迹是一半径为10 cm的圆弧,运动轨迹平面与磁感应强度大小为 的磁场垂直.(已知质子的质量 ,电量 )该质子动能的数量级为 ( )
【单选题】It's never easy for a mighty military to tread lightly on foreign soil. In the case of American forces in South Korea, protectors of the nation's sovereignty since the Korean War, the job is made doub...
A.
the massacre of 200 pro-democracy protesters
B.
many tragic outcomes of U.S. Korean cross-country marriage
C.
sexual assaults on Korean prostitutes
D.
American servicemen's behaviour in South Korea
【单选题】睡眠不足是引起工作事故的众所周知的原因。许多医生经常连续24小时或更长时间不睡觉,然而在同事之间做的常规检查中,这些医生很少有被诊断为睡眠不足。因此没有理由担心习惯性睡眠不足会导致广泛的医疗事故。 对下列哪个问题的回答最有助于评价上面的论述?( )
A.
诊断为睡眠不足的医生是否同时也表现出其他与睡眠无关的疾病征兆
B.
医生习惯性睡眠不足是否会严重减弱他判断他人睡眠不足征兆的能力
C.
是否除了习惯性睡眠不足之外还有其他的医生本身的因素而导致工作失误
D.
在最近接受治疗的人当中,相信医生有时受睡眠不足之苦的人占大多比例