根据图片完成下面的语段。

      Zhang Peng has a pen pal. His name is John. John goes to school 1_______________ . John's mother

is a 2_______________ . John's father is a 3_______________ . They live next to a

4_______________ . John's favourite food is 5_______________  and his favourite colour

is red.

简述阳极液系统的组成。