根据汉语提示完成对话。

Mike: What are you going to do 1_____________ (放学后)?

John: I'm going to buy some books. Where is the 2_____________ (书店)?

Mike: It's next to the 3_____________ (邮局).

John: How can I get to the post office?

Mike: You can go by the 4_____________ (1路公共汽车). Get off at the 5_____________ (图书馆).

         Then walk straight for ten minutes. The bookstore is on the right.

John: Thank you.

最大呼气流量是指

A．用力肺活量测定过程中，呼气流速最快时的瞬间流速
B．根据用力肺活量曲线计算得出用力呼出25%～75%的平均流量
C．深吸气至肺总量位后以最大力量，最快的速度所能呼出的全部气量
D．每分钟最大通气量与每分钟静息通气量之差
E．平静呼气末再尽最大力量呼气所呼出的气量