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第一节纯扭构件 5.1.1矩形截面纯扭构件的开裂扭矩 弹性材料(P92,5-5a):Tmax=2,(3.03≤≤4.79) 塑性材料:Tmaxyy2,(2.0≤y1≤3.0)
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Countless divisions of a single-celled zygote produce an organism of astonishing cellular complexity and organiza- tion. Any individual cell is bound to die, because cells are subject to wear and tear as well as to accidents. 25 million cells are undergoing division each second in an adult human and blood cells renewed at the rate of about 100 million per minute. If an organism is to continue to live
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This paper is an updated version of a previous working paper, Capital Budgeting in the Presence of Managerial Overconfidence and Optimism, by the same authors. Financial support by the Rodney L. white Center for Financial Research is gratefully acknowledged. The authors would like to thank Andrew Abel, Jonathan Berk, Domenico Cuoco, David Denis, Janice Eberly, Robert Goldstein, Peter Swan, and seminar
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CHAP2生态学基础 2-1生态学基础 一、生态学与生态 1.生态学(Ecology): A.传统定义:研究生物与其生活环境相互关系的学科。(侧重于植物、动物)
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where f:R\×Rn×R→ R\ and g:R\×R\×R→ R are continuous functions. Assume that f, g are continuously differentiable with respect to their first two arguments in a neigborhood of the trajectory co(t), yo(t), and that the derivative
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一、单项选择题 1、我国从到死亡时止,具有民事权利能力,依法享有民事权利,承担民事义务 A.年满10岁 B.年满18岁 C.年满16岁 D.从出生时起
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The analysis of the outcome of a reaction requires that we know the full structure of the products as well as the reactants In the 1 gth and early 20th centuries, structures
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一、选择题 1、信念是()的融合和统一 A、认识、情感和理想 B、认识、情感和意志 C、认识、态度和意志 D、态度、情感和理想
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设计变化要点: 1、肩部的变化 肩线分为三类:自然形、耸肩形、溜肩形。 A、自然形的特点是衣肩的倾斜比较轻松自如
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一、特征值与特征向量的概念 定义1设A是n阶矩阵如果数λ和n维非零列向量x使关系式
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