小亮上周每天的睡眠时间为（单位：小时）：8，9，10，7，10，9，9，这组数据的众数是____

已知a^m=2，aⁿ=3，则a^4m﹣3n的值是（   ）

请将以下缺乏症的序号填在对应维生素的横线上

A.维生素A____①佝偻病

B.维生素B₁____②坏血病

C.维生素C____③脚气病

D.维生素D____④皮肤粗糙

阅读理解
    Hi. I am Maya. I am 13 years old. I am from Africa. My father is a teacher and my mother works in a hospital. Now they are working in Beijing. They both like their work and work very hard. My father's favorite animal is the panda, but I like dolphins best.
    I am studying in a middle school. And I like music and drawing best. I want to be a designer. I like to design my room. I like the color pink, so there are a lot of pink things in my room.
    I have three friends in my room. They are Mike, Dora and Peter. They are my toys. I love them. Every night, they sleep with me.

①is ②brother ③my ④This

____