Peter: Do you have a brother, John?

John: Yes, I do. His name is Mike.

Peter: Is he older than you?

John: No, he is younger than me. He is three years younger than me. He is 12 years old.

Peter: He is shorter than you, isn't he?

John: No, he is a little taller than me.

Peter: Are his eyes bigger than yours?

John: Yes, his eyes are bigger than mine.

Peter: Who loves sports more, you or your brother?

John: He does. He is good at playing football.

西方有经济学家专门研究过裙子与经济的关系。叫做“裙子经济”，结论是：裙子的长度与经济的发展成反比。也就是说，裙子越长，经济就越落后；裙子越短，经济就越先进，越发展。以19世纪中期英国为例，此时英国女性一改中世纪曳地长裙、行不露脚的式样，裤装和短裙逐渐流行起来。这一转变充分说明了（    ）

如图是消化系统部分组成器官的示意图，其中属于消化腺的有1和5，请据图回答问题：