A:1:2.5
B:2.5:1
C:5:2
D:2:5
完成下列关于绿色植物的叶片结构及功能的概念图.
①____②____ ③____ ④____⑤____.
Look! That car is moving slowly. It's ________.
读湖南省略图,回答下列问题。