20.0
12.8
第二产业比重(%)
64.3
49.6
第三产业比重(%)
15.7
37.6
材料三:三江平原湿地变化图
--- On my birthday, I got a lot of gifts.
--- That's great! I'm looking forward to my birthday.
画出小飞机向下平移8格,再向左平移6格的图形.