科学家将人体男性、女性体细胞内的染色体进行整理，形成了如图的排序图．分析后回答下列问题．

根据短文内容, 选择正确答案。

    Hi, I am Andy. I am in Class 3, Grade 7. Welcome to our classroom. Isn't it big and clean?

   We all have lockers (柜) in the classroom. The red lockers are girls'. And boys' lockers are yellow. Do you like the colours? I have a locker too. This one is mine (我的). I put many things in it. There are some comic books, a football, and a pair of shoes in it. Jack's locker is beside（在……旁边） mine. There are socks and some paper in it. That one is Tom's. There are many CDs and books in it. His glasses are in the locker too.

    What is in Mary's locker? There is a yellow bag in it. What's in the bag?  We don't know. I guess there are lots of snacks(零食) in it.

在交通繁忙的路口，环保部门有时会安装某种装置﹣﹣噪声显示牌，用来监测路口的“动静”，显示牌的示数会随着声音的变化而变化，如“60，70，80，…”显示牌示数的变化反映了声音的 ____发生了变化，显示牌示数的单位是 ____