Mg-Ni系的一个共晶反应为 507℃ L(23.5Wt.%Ni)a(纯镁)+Mg2Ni(54.6Wt.%Ni) 设C1为亚共晶合金,C2为过共晶合金,这两种合金中的先共晶相 的重量分数相等,但C1合金中的a总量为C2合金中的q总量的 2.5倍,试计算C1和C2的成分

有-70MPa力作用cm向上1 110滑移系上的分切应力。 答矢量数性积

在Fe中形成1mol空位的能量为104675kJ,试计算从20℃升温至850℃时空位数目 加多少倍?

1.何谓同位素?为什么元素的相对原子质量不总为正整数? 在元素周期表中占据同一位置,尽管它们的质量不同,然它们的化学性质相同的物质称 答 为同位素。由于各同位素的含中子量不同(质子数相同),故具有不同含量同位素的元 案 素总的相对原子质量不为正整数

Task Team of FUNDAMENTAL ACCOUntING hool of Business, Sun Y at-sen University Lesson 14 Managerial Accounting Il: Application L. True and False Questions Decision making is a distinct management activity that should be separated from budgeting

Task Team of FUNDAMENTAL ACCOUntING hool of Business, Sun Y at-sen University Lesson 13 Managerial Accounting I: Concepts and Principles Self-Test I. True and False Questions Managerial accounting places less emphasis on precision and more emphasis on flexibility

Task Team of FUNDAMENTAL ACCOUntING hool of Business, Sun Y at-sen University Lesson 12 Internal Controls and Business ethics Self-Test True or False 1. The accounts receivable subsidiary ledger controls the accounts receivable account in the genel

Task Team of FUNDAMENTAL ACCOUntING hool of Business, Sun Y at-sen University Understanding Accounting Standards es True and False Questions 1. Accounting standards are laws accountants should follow in their work

ask Team of FUNDAMENTAL aCcoUnting School of Business Sun Yat-sen Universit Lesson 10 Understanding and Using financial Statements What type of analysis is indicated by the following? Percent Current assets

Task Team of FUNDAMENTAL ACCOUntING hool of Business, Sun Y at-sen University Lesson 9 Financial Statements Self-Test 1. True or Fals 1) Financial statements are standard documents that tell us, in financial terms, how well a