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【简答题】
How much of man's history do we know? We really know very little. Written records exist for only a fraction of what we suppose to have been man's time as a unique species. Furthermore, the accuracy of these records is often suspect, and the scope and selection of significant detail in them often needs improvement. At times there is no more than a collection of a few songs, myths and legends. Even in recent times, the not uncommon lack of truly factual historical data makes it difficult to reconstruct an accurate picture of what actually did happen in history. It is worse when we try to reconstruct man's history before the development of writing, and this is unfortunate because the history of the greatest discoveries, such as fire, the wheel and the sail, as well as the history of the early development of human society are lost to us. The most that we can do is to use traces, deduction, speculation and the knowledge we have of the habits of those animals which have some elementary social order to help us make a partial reconstruction. This is hardly a satisfactory substitute for precise information. With our knowledge of human history, which is only fragmentary at best, it is therefore nearly impossible to reconstruct the beginning, and to deduce the end, of the story of man. Thus, there have developed many schools of thought on the subject, each of which attempts to give coherence to the human past by fitting it into the framework of a theory of history.
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【判断题】《纽伦堡法典》 核心内容是严格规定了人体试验中对受试者的保护。
A.
正确
B.
错误
【单选题】球的圆周为()CM。
A.
65-68
B.
60-65
C.
65-67
D.
64-67
【判断题】《纽伦堡法典》 核心内容是严格规定了人体试验中对受试者的保护。
A.
正确
B.
错误
【简答题】在一根3m长的色谱柱上分离一个试样的结果如下:死时间为1min,组分1的保留时间为14min,组分2的保留时间为17min,峰宽为1min。 1用组分2计算色谱柱的理论塔板数n及塔板高度H;2求组分1和2的调整保留时间;3用组分2求有效塔板数n及有效塔板高度Heff;4求容量因子k1及k2;5求相对保留值r2,1和分离度R。
【单选题】《纽伦堡法典》的核心内容是( )。
A.
严格规定了动物实验中动物应该享有的福利
B.
严格规定了人体试验中对受试者的保护
C.
严格规定了医学科学研究人员必须预防学术不端行为
D.
严格规定了医学科学研究中伦理委员会的审查职责
【简答题】若球O的球面上共有三点A、B、C,其中任意两点间的球面距离都等于大圆周长的 经过A、B、C这三点的小圆周长为 ,则球O的体积为       .
【简答题】柱子K1长度为 米
【简答题】均匀磁场B被限制在半径为R的无限长圆柱面内,磁场对时间的变化率为 k,(k为小于零的常数),有一长度为R的导体棒AC水平放置在磁场中,如图4-11所示,求: (1)导体棒中感生电动势的大小和方向; (2)在P点处有一电子的运动方向.
【单选题】我们同父母产生 “ 代沟 ” 的原因是 ( )
A.
两代人成长的社会背景差异是唯一原因
B.
两代人成长的社会背景差异是原因之一
C.
盲目追星造成的
D.
父母思想僵化造成的
【单选题】正式足球比赛对球的圆周有一定的要求,其要求是( )。
A.
68cm~71cm
B.
68cm~70cm
C.
69cm~71cm
D.
69cm~70cm
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