1、构件在外力的作用下抵抗破坏的能力称为构件的 2、杆件在外力的作用下产生的变形有轴向拉伸与压缩

一、选择题 1.图示机构中有虚约束

一.填空题(25分,每题1分) 1.两构件之间为接触的运动副称为低副,引入一个低副将带入个约束

荆州职业技术学院：《机械设计基础》课程教学资源（电子教案）第六章 齿轮传动

1一个平面力系是否总可用一个力来平衡?是否总可用适当的两个力来平衡?为什么?

Be aware of what is selling and buying Be aware of the sales process Know how to negotiate on the phone Know how to negotiate an international deal

Objectives When the learners finish learning this unit, they should be able to: ask for and give information make and answer enquiries make and accept offers place, acknowledge and fill orders

Objectives When finishing learning this unit, you should be able to: Deal with some kinds of problems encountered in business. Complain and apologize by letter, fax or e--mail

一、煤炭开采的发展历史 开采利用煤炭已有几千年的历史,早在公元 前500多年的春秋战国时期,煤炭已经成为一种重要产品

四川信息职业技术学院：《数控设备调试与维护》课程教学资源（试卷习题，含答案）模拟试卷十一