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习题18-3 解:火车的固有长度为l=300m火车速度为v=100(km.h-)=250/9(m.s)
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人教版《小学英语》课堂练习同步配套教学课件(三年级上册)Unit 3 Look at me!_Part B Start to read & Let’s check
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例1一飞轮半径为0.2m、转速为150rmin-1,因 受制动而均匀减速,经30s停止转动.试求:(1) 角加速度和在此时间内飞轮所转的圈数;(2)制动开 始后t=6s时飞轮的角速度;(3)t=6s时飞轮边缘 上一点的线速度、切向加速度和法向加速度
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一、由电路求响应 由S域等效电路 1.元件→域运算阻抗R,L,M,C→R,L,M、 sC信号→象函数i(t),u(t)→I(s),U(s)
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4.1写出下列信号对应于s平面的复频率。 (1)e-sin(-5t) (2)3e-e(t) (3)cos 2t (4)2e-cos(2t+60°)
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1. The branch of accounting which aims at serving external users is called 2. a credit entry decreases asset and accounts or increases liability owner's equity, and revenue accounts
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1 The Emerging Generation 2 Realizing the Rights of Adolescents 3 Global Challenges for Adolescents 4 Investing in Adolescents
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17-1 Introduction 17-2 Why is needs 17-3 Management's responsibility 17-4 types of threat • Security Architecture • Security attacks • Security services
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Part I OMG's technology adoption process UML 1.4, 1.5, 2.0 UML 2.0 in MDA The current status of UML 2.0 Part II UML 2.0 Superstructure Specification Thirteen diagrams in UML 2.0
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An introduction to Western Social Theory e l.The significance of studying western social theory e1. 1 The developing tendency of social science =1. 2 The sociology's researching target 3.1.3 The independence of sociology
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