1. The ownership structure of a business includes the following forms: A. Individual, group, corporate. B. Sole proprietorship, partnership, or corporation D. Debtors, creditors, and ownesancia C. Service, manufacturing, and financial. 2. Which of the following is NOT true concerning a sole proprietorship? A. A sole proprietorship is a company

6.1A/D转换器的分类 6.2A/D转换器的主要技术指标 6.3逐次逼近式A/D转换器 6.5单片集成A/D转换器 6.6如何选择和使用A/D转换器 6.7A/D转换器与微机的接口

一、单选题 1.D 2.B 3.D 4.C 5.D 6.A 7.B 8.D 9.B 10. A 11. C 12.B 14. B 13. A 15.B 16.D 17.A 18. (1) A (2) D (3) D (4) C (5) C 19. D 20.C 21.A

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定义 7－1：如果两个整数 a，b 被模 m 除后有相同的余数 r，即： a=q1m+r，b=q2m+r 则称 a,b 对模 m 同余，记作 a≡b mod m。 否则称 a,b 对模 m 不同余，记作 a≡b mod m

Chapter 3 Pressure-activated membrane processes M. J. LEWIS, Department of Food Science and Technology, The University of Reading, Reading RG6 6AP 3.1 INTRODUCTION Over the last 30 years, a number of membrane processes have evolved, which make use of a pressure driving force and a semi-permeable membrane in order to effect a separa- tion of components in a solution or colloidal dispersion. The separation is based mainly on molecular size, but to a lesser extent on shape and charge. The three main processes

§A-1 静矩和形心 §A-2 惯性矩和惯性积 §A-3 平移轴公式 §A-4 转轴公式（了解） §A-5 主惯性轴、主惯性矩、形心主惯性矩

Three Alternative strategies Take a position in the option and the underlying Take a position in 2 or more options of the same type(a spread Combination: Take a position in a mixture of calls puts(A combination)

定义:对于An,若有B满足AB=BA=E,则称A为可逆矩阵, 且B为A的逆矩阵,记作A-1=B 定理1若A为可逆矩阵,则A的逆矩阵唯一 证设B与C都是A的逆矩阵,则有

定理1(1)若矩阵A经过有限次初等行变 换变成B,则A的行向量组与B的行向量组等价; 而A的任意k个列向量与B中对应的k个列向量 有相同的线性相关性。 (2)若矩阵A经过有限次初等列变换变 成B,则A的列向量组与B的列向量组等价;而 A的任意k个行向量与B中对应的k个行向量有 相同的线性相关性