下列不能为人体生命活动提供能量的是（　　）

A

    Hi! I'm Alan Miller．I'm an English boy．I'm 12．I'm in Grade Seven．My parents work in Tianjin now．My father is a teacher and my mother is a doctor．I have a brother, John．We are students in a middle school in Tianjin．He is 14 and he is in Grade Nine．We are in the same (相同的) bedroom．He puts his things in their right places，but my things are everywhere．

    Hello! My name is Zhou Wen．I am a Chinese girl．I'm 13．I'm a student of Grade Seven．Now I live in Beijing with my parents．My father is a doctor．My mother is a teacher．She teaches English in a school．My sister Zhou Xue is 3．She is with my grandparents．They are in Tianjin．My grandparents look after my sister．

根据材料内容选择最佳答案。

某部队第一天行军5h，第二天行军6h，两天共行军120km，且第二天比第一天多走2km，设第一天和第二天行军的速度分别为xkm/h和ykm/h，则符合题意的二元一次方程是（　　）

根据拼音写出相应的词语。