外研版（三起）（2012）小学英语六年级下册Module 5 Unit 1 He is playing the suona,but the phone rings.Module 5 Unit 1 He is playing the suona,but the phone rings.习题(2)

外研版（三起）（2012）小学英语六年级下册Module 5 Unit 1 He is playing the suona,but the phone rings.Module 5 Unit 1 He is playing the suona,but the phone rings.习题(1)

§5-1 概述 §5-2 计算机控制系统的组成及分类 §5-3 测试软件设计 §5-4 直接数字控制系统

外研版（三起）（2012）小学英语五年级下册Module 5 Unit 2 It's too big for you.Module 5 Unit 2 It's too big for you.课件(9)

5．3 机器选型 5．4 驱动机的选型 5．5 变压器选型

外研版（三起）（2012）小学英语五年级下册Module 5 Unit 2 It's too big for you.Module 5 Unit 2 It's too big for you.课件(8)

外研版（三起）（2012）小学英语五年级下册Module 5 Unit 2 It's too big for you.Module 5 Unit 2 It's too big for you.课件(6)

外研版（三起）（2012）小学英语五年级下册Module 5 Unit 2 It's too big for you.Module 5 Unit 2 It's too big for you.课件(4)

外研版（三起）（2012）小学英语五年级下册Module 5 Unit 2 It's too big for you.Module 5 Unit 2 It's too big for you.课件(3)

第五章摩擦 5-1引言 5-2滑动摩擦 5-3考虑摩擦时的平衡问题 5-4滚动摩擦