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Unit 6 Reading Comprehension Directions: There are 3 passages in this unit. Each passage is followed by some questions or unfinished statements For each of them there are four choices marked A), B), C)and
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1. We plan to reach the Pole in mid-July, and by then we for six weeks A)are walking B)have been walking C) will be walki D)will have been walking
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1. If you had come earlier, you the famous scientist a could be met b. might meet c would have met d. would meet
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三种基本形式 If had a bike.I would lend it to you(f从句用过去时,主句用 should/ would/ could/ mighti不定式) If he had been here he would have helped you(从句过去完成时,主句 should would/ could/ might+不定式完成时) I would do it some other wa(从句用 should/ were to3主句用 should/woud could /might+不定式)
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一、“好中求好”—最大最大决策准则 二、“坏中求好”—最大最小决策准则 三、a系数赫威斯决策准则 四、最小的最大后悔值准则
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1.拉格朗日变数(a,b,c)给出的流体运动规律为x=ae,y=b(1+1) z=ce(1+t) -2 l)求以欧拉变数描述的速度场;
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1、下列说法能否作为a是数列{an}的极限定义?为什么? (1)对于无穷多个E>0,彐N∈N+,当n>N时,不等式{an-叫<∈成立;
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一、名词解释(15分) 1.计算机网络: 凡是将分布在不同地理位置并具有独立功能的多台计算机,通过通信设备和线路连接起来,在功能完善的网 络软件(网络协议及网络操作系统等)支持下,以实现网络资源共享和数据传输为目的的系统,称为计算机网络
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已经具备了比较良好的条件 推动经济和社会发展达到新的水平(1) raise its economic and social develpoment to a new level 维护地区的和平与稳定,发展经济科技(1) maintain regional peace and stability, develop economy, science and technology, 扩大互利合作,促进共同繁荣
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Simultaneity Simultaneity is a specific type of endogeneity problem in which the explanatory variable is jointly determined with the dependent variable 2 As with other types of endogeneity, IV estimation can solve the problem o Some special issues to consider with simultaneous equations modelS(SEM) Economics 20- Prof anderson
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