Sntroduction to Sociology . Race: The Power of An Illusion ll. Thinking about Race and Ethnicity: What is Tiger Woods? lll. Why race does not exist... except as a social construct ll. Ethnicity and Race as Folk Concepts

L14: 14 Lectures past and 1 1 to go Part 'The cell as a well-stirred bioreactor topICs Lambda phage lysis-lysogeny switch Synthetic genetic switch Switches as memory storage Chemotaxis: perfect adaptation or not? Synthetic genetic oscillators

一、单项选择 1、繁荣文学艺术的主要任务是多出优秀作品,以()。 A.科学的理论武装人 B.正确的舆论引导人 C.高尚的精神塑造人 D.优秀的作品鼓舞人

一、单项选择 1、我国经济体制改革的目标是建立()。 A.有计划的商品经济 B.计划和市场相结合的经济体制 C.市场经济体制 D.社会主义市场经济体制

1 Find F(s) if f(t) = (a)(t-3);(b)4t u(t-3); (c)4 cos to(t-3). 2 Obtain partial-fraction expansions for each of the following rational functions, and find the corresponding time functions:

Published by woodhead Publishing Limited, Abington Hall, Abington Cambridge cb1 6AH. england www.woodhead-publishing.com Published in No d South America by CRC Press LLC, 2000 Corporate Blvd, Nw Boca raton Fl USA First edition 1992. Ellis Horwood Ltd

一、选择题 1．（C） 2．（D） 3．（C） 4．（A） 5．（D）

A cosine voltage is zero and increasing at t=-1 6ms; the next zero crossing occurs at t 4.65ms. (a)Calculate T, f, and @.(b) If v(0)=20V, find v(t).(c)By what angle does v(t) I(t)=5cos(t-110°)A? 2 For the sinusoidal waveform shown in

一、简谐振动的描述 1、简谐振动方程: 2、描述简谐振动的物理量: (1)由系统性质决定、V、T: (2)由初始条件决定A、φ: 3、用旋转矢量描述简谐振动:

I Let L= 1.25 H in Fig. 6-11, and determine v(t)if v(0) 1(02)=20A L 0.05F ig 6-11 For prob. I 2(a)What value of L in the circuit of Fig 6-11 will result in a transient response of the form, v(t)