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药品标准 drug standard 质量标准 quality standard 标准品 standard substance 国际标准品
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聚合反应 由很大数量的一种或多种小分子单体重复键合连 接而成大分子化合物的反应;
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UPTO NoW HAVE CONJSI DERED PROBLEMS RELEVANT To THE RIGID BO0Y OYNAMICS THAT ARE IMPORTANT To AEROSPACE VEHICLES USED A BODy FRAME THAT ROTATES WITH THE VEHICLE ANOTHER TMPORTANT CLASS oF PRoBLEMS FoR Bo DIES SUCH AS GyRoscofes ROToR WITH HIGH SPIN RATE ESSENTIALY MASSLESS FRAME
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多底物酶占所有酶的一半以上。见下表:表酶反应按底物数的分类
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环境工程是一门运用工程、技术的方法和手段来控制环境污染及改善环境质量的学科
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16.61 Aerospace Dynamics Spring 2003 Lagrange's equations Joseph-Louis lagrange 1736-1813 http://www-groups.dcs.st-and.ac.uk/-history/mathematicians/lagranGe.html Born in Italy. later lived in berlin and paris Originally studied to be a lawyer
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16.61 Aerospace Dynamics Spring 2003 Derivation of lagrangian equations Basic Concept: Virtual Work Consider system of N particles located at(, x2, x,,.x3N )with 3 forces per particle(f. f, f..fn). each in the positive
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16.61 Aerospace Dynamics Spring 2003 Example Given: Catapult rotating at a constant rate(frictionless, in the horizontal plane) Find the eom of the particle as it leaves the
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ECTURE +2 RIGId BoDY DYNAnIC 工Ap1CAT105FA。R工 GENERAL ROTATIONAL JYNMICS EULER'S EQuATIoN of MOTIoN TORQVE fREE SPECIAL CAsEs PRIMARY LESSONS 3D RoTATONAL MOTION MUCH MORE COMPLEX
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16.61 Aerospace Dynamics Spring 2003 Generalized forces revisited Derived Lagrange s equation from d'Alembert's equation ∑m(8x+16y+22)=∑(Fx+F+F。=) Define virtual displacements sx Substitute in and noting the independence of the 8q,, for each
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