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I If f(t)=100 for 04.(a) Calculate v at t=T/4.(b) Find the average power delivered by this waveform to a 5Q2 resistor 3 Let v(t)=3-3 cos(100 t-40)+4 sin(200 T t-10)+2.5 cos 300 tt V Find: (a)the average value Var;(b)the rms value V;(c)the period T; (d)v(18ms)
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2005年4月笔试试卷参考答案 一、选择题 (1)D)(2)B)(3)D)(4)C)(5A)(6)C)(7)B)(8)D) (9)D)(10)C)(11)B)(12)D)(13)A)(14)B)(15)A)(16)D) (17)A)(18)B)(19)A)(20)C)(21)D)(22)A)(23)D)(24)B) (25)C)(26)A)(27)B)(28)C)(29)C)(30)C)(31)D)(32)B) (33)D)(34)A)(35)D) 二、填空题
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5-A1 2,4,6-Tribromanilin aus Anilin 5-A2 2-Amino-4’-nitrobiphenyl aus 2-Aminobiphenyl 5-A3 Bis(4-methoxyphenyl)phenylmethylchlorid ausBenzotrichlorid und Anisol
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阶段测试题(一)参考答案 一单项选择题:(每题1分,共10分) 1.d;2.a3.d:4.a5.b6.b7.a8.d9.b:10.b
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wrong shape for a heavenly messenger. Anyway, it's time to stop wondering whether she came from heaven or a nearby town. What matters is this: whoever she was, Aunt Esther Gubbins was right.\
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一、单项选择题 1 A 2 B 3 C 4 B 5 C 6 D 7 B 8 A 9 D 10 A 11 B 12 D 13 B 14 C 15 C
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Virus a noncellular genetic element that enlists a cell for its own replication, it has an extracellular state. A virus particle containing nucleic acid surrounded by protein and other macromolecular components is called virion
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复化求积法的基本思想: 将积分区间[a,bn等分,可得到n+1个求积 节点:Xk=a+kh,(k=0,1,n),其中h=b-a
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Book two Unit si Section a: As his Name Is. so is hel Preview This writer describes ways names can make a difference. When one woman used her middle name, she felt better and her professional achievement improved. A magazine
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6=e.e e.×e Eiker j Vφ 随体倒数Dn-ar +(V)a a e Vxa=(e.)x(a e)=e
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