一、材料力学的任务、作用和地位 二、基本假设 三、基本概念 四、变形的基本形式

(a)受集中力作用 (b)应力分布图 图（a）是一端固支、一端受集中力作用的杆件，其厚度为 1 mm

第1章：办公自动化技术概述 第2章：Word操作与应用 第3章：Excel操作与应用 第4章：PowerPoint操作与应用 第5章：计算机网络基础

One complication associated with alkene hydration is the occurrence of arrangements

Acetylenic hydrogens can be deprotonated with relatively strong bases (sodium amide is typical)

Alkenes are hydrocarbons whose molecules contain the carbon-carbon double bond. Alkynes are hydrocarbons whose molecules contain the carbon-carbon triple bond

Infrared Spectroscopy: An Instrumental Method for detecting Functional Groups

Substitution reactions occur when two reactants exchange parts to give two new products. In a substitution, one replaces another

21.11 Aryl Halide and Nucleophilic Aromatic Substitution 21.12 Spectroscopic Analysis of Phenols and Aryl Halides

17.7 Lithium Enolates 17.8 α-Selenation: A Synthesis of α,β-Unsaturated Carbonyl Compounds 17.9 Additions to α,β-Unsaturated Aldehydes and Ketones