书面表达。

仔细观察，根据图示回答下列问题。每小题只限写一句话。

1. What are the students in Picture l doing?

     __________________________________________________________

2. What do the students see while they are on their way home? 

     __________________________________________________________

3. What happens to one of the boxes on the truck? 

     __________________________________________________________

4. What is one of the students doing after he sees what has happened? 

     __________________________________________________________

5. What will the students and the policeman probably do with the wounded driver? 

     __________________________________________________________

在涡轮--压气机--风扇式空调制冷装置中，为除去引气中的水分，一般是：（）

A、在温度控制活门出口处安装一个冷凝除水器。

B、在涡轮冷却器涡轮进口前安装冷凝除水器。

C、在一级散热器和二级散热器之间安装冷凝除水器。

D、在涡轮冷却器压气机进口处安装冷凝除水器。