A:6
B:9
C:8
D:7
如图所示是某同学制作的脱氧核苷酸对模型,其中正确的是( )
Hello. I am Amy. I am eight years old. Today is my birthday. Look, I have a birthday cake. I have juice and rice for dinner. And I have many gifts, too. A red toy monkey, two new bags and five storybooks. I am so happy today.
侧面积是____ dm2