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University of Michigan shows. Researchers used two U, S. data sets, one being a nationally represented study

球速度v的径向分量vn减为0，而只保留切线分量v1．则新的线速度v'=v1=vsinα=0.6m/s． 而  (3)拉力提供向心力，即  14．(1)5m/s2     (2)    (3)   15．(1)

to get achievements as unusual as Jessica Watson’s. Watson calls herself “an ordinary girl who had a

兰玉杰、陈晓剑：企业家人力资本激励约束机制的理论基础与政策选择 数量经济技术经济研究 2002年第2期 Becker, Gary S., 1960 “An Economic Analysis of Fertility”. In Ansley

man＇s pig ate some potatoes of an American farmer＇s. 24. The underlined word “they“ in Paragraph 4 refers

雪⑨，将⑨式化简得ｔ＝＋⑩，从⑩式看出×＝＝常量，故当＝，即时ｖ＝，其ｔ有最小值． 因而ｖ＝＝m/s＝2m/s＝4.47m/s．通过解答可知工件一直加速到Ｂ所用时间最短． 评析：此题先从工件由匀加速直线运动直至匀速与传送带保持

was born in 1958 to a poor family in Indiana, U. S. He had nine brothers and sisters. When Jackson was

在第Ⅰ阶段，有I1＝＝＝2.5 A. 感应电流方向沿逆时针方向，持续时间为t1＝＝ s＝0.1 s. ab两端的电压为U1＝I1·r＝2.5×0.2 V＝0.5 V 在第Ⅱ阶段，有I2＝0，ab两端的电压U2＝E＝Bl′v＝2

Jane’s dress is similar in design_________her sister＇s. A.like B.with C.to [答案]C 15.The sports meeting was

，通过研究成千上万的专利，他发现了发明背后的模式并形成了TRIZ理论的原始基础。在阿奇舒勒(G. S. Altshuller)的领导下，前苏联的研究机构、大学、企业组成了TRIZ的研究团体，分析了世界

侧渗透,水蒸气传递方向是逆压力方向的,因此称之为湿泵。使用湿泵可以利用低品位热源,节省高品位电能。S. Paul 等人则将冷凝除湿和膜除湿结合使用[ 28 ] ,其优点是:冷凝液体不直接与被除湿的空气接触

health quiz. Compare your results with your partner’s. Who’s healthier? 2. Read the quiz and the chart first

career-oriented father ___32___ you＇ll carry on your father＇s. ___33___ enough, having a mother with this viewpoint

现正方形以每秒 的速度匀速沿x轴正方向平行移动,设运动时间为t秒,正方形被夹在直线OE和CF间的部分的面积为S. (1)当0≤t < 4时,写出S与t的函数关系; (2)当4≤t≤5时,写出S与t的函数关系,在这个范围内S有无最大值

Our lives can be as difficult as the little stream＇s. D. To succeed, we should change the way we used to

答：（1）汽车在前20s、后40s平均速度分别为12m/s、16m/s； （2）汽车通过全路程中的平均速度是14.7m/s． 30. 解：黄河水的体积为10dm3=0.01m3， 设含沙的体积为V，则含水的体积为（0.01﹣V），

改善目前的狀況。滿 意目前狀況理想狀況需求整套解決方法 5. 購買心理 - A. I. D. M. A. S. AttentionInterestDesireMemoryActionSatisfaction 感到滿意

the building. ---One is Bill’s,____ is the manager’s. A. other B. another C. others D. the other .11. ----There

从而lng(t)lnt=lnslnf(s)=lnsln(s2lns)=lns2lns+ln(lns)=u2u+lnu, 其中u=ln s.要使25 e2时,若s=g(t)≤e,则由f(s)的单调性,有t=f(s)≤f(e)=e2,矛盾.所以s>e

Jane＇s dress is similar in design_________her sister＇s. A.like B.with C.to [答案]C 15.The sports meeting was