线性代数 公式速记 - 矩阵 编号：177 一、矩阵基本运算公式 1. 加法：A+B = B+A，(A+B)+C = A+(B+C)。 2. 数乘：k·(A+B)=kA+kB，(k+l)A=kA+lA，k(lA)=(kl)A。 3. 乘法：(AB)C=A(BC)，A(B+C)=AB...

CET6 翻译常考词 CET6 Translation Practice (117) Date: __________ Score: __________ Time: 30 min Part I: Chinese-to-English Translation (30 minutes) Directions: Translate the follow...

CET6 翻译常考词 CET6 Translation Practice (146) Date: __________ Score: __________ Time: 30 min Part I: Chinese-to-English Translation (30 minutes) Directions: Translate the follow...

CET6 阅读套路 CET6 Reading Drill (15) Name: __________ Date: __________ Score: __________ Section A: Banked Cloze (10 blanks, 10 points) Directions: Fill in each blank with a word ...

CET6 阅读套路 CET6 Reading Drill (56) Name: __________ Date: __________ Score: __________ Section A: Banked Cloze (10 blanks, 10 points) Directions: Fill in each blank with a word ...

线性代数 6大典型题 - 行列式 编号：098 三、行列式性质应用-化三角 专题 【题目】计算 n 阶行列式 D_n = |a 1 1 ... 1; 1 a 1 ... 1; ...; 1 1 1 ... a|。 【解析】将所有行加到第一行得 (a+n-...

College English Test Mock Examination Mock Exam (58) - CET-6 Level: CET-6 | Total: 710 points | Time: 130 min Name: __________ ID: __________ Score: __________ Part I: Writing (30 ...

线性代数 6大典型题 - 行列式 编号：156 一、二阶行列式计算 专题 【题目】计算行列式 D = |3 5; 2 -1|。 【解析】二阶行列式公式：|a b; c d| = ad - bc。 D = 3*(-1) - 5*2 = -3 - 10 = -13。...

CET4 写作模板 CET4 Writing Template (52) Name: __________ Date: __________ Score: __________ [Variant 2] Type: Problem-Solution Essay Writing Topic: How to Tackle the Problem of Sm...

CET4 Writing Writing Template (110) - An Advertisement for a Second-hand Book Sale V. 应用文模板 (Notice / Advertisement / Speech) 【1. 通知 Notice】 [NOTICE / Announcement] Title:...