排序，组成一段通顺的对话。

( ) It's next to the post office.

( ) What are you going to do after school?

( ) How can I get to the post office?

( ) I want to buy an English book. Where is the bookstore?

( ) You can take the No. 31 bus. Get off at the cinema. Then walk straight for 3 minutes.

         The post office is on the left.

( ) You are welcome.

( ) Thank you.

在环境温度低于30℃，机体处于安静状态下的主要散热方式是（）。

A.辐射散热

B.传导散热

C.对流散热

D.不感蒸发

E.可感蒸发