Unit 1 Introductions and greetings 1.1 Introducing yourself (1)Vocabulary Morning, afternoon or evening? What do you say?

I. Choose the Correct Answer 1. An object is moving along the x axis with position as a function of time given by x=x(). Point is at x 0. The object is definitely moving toward O when

I. Choose the Correct Answer 1. Which statement is most correct? (C) (A)Uniform circular motion causes a constant force toward the center. (B)Uniform circular motion is caused by a constant force toward the center

I．Choose the Correct Answer 1. An object is moving in a circle at constant speed v. The magnitude of the rate of change of momentum of the object （ C ）

Summer Conditions Heat flow Indoor air temperature Summer Conditions Heat flow Indoor air temperature Remove heat from indoor air Finned-Tube Heat Exchanger

一、理想循环—逆卡诺循环 冷凝器 蒸发器

1制冷的种类 -水(℃以上) -水(Brine,0℃以下) ·氯化的液

1、节流降压 2、控制冷媒流量,使蒸发器保持一定液体量 3、等焓过程

1、辅助设备有哪些？ 1.1氟利昂螺杆冷水机组组成 1.2 制冷系统及其辅助设备

一、压缩机的类型 二、活塞式压缩机的工作过程及热力计算