用图甲所示的装置做“验证力的平行四边形定则”实验，请完成下列相关内容．
排序。
A. There are five books on the table.
B. It's small, but it's clean.
C. There is a doll on the bed.
D. Look! This is my room.
E. I like my room.
F. There is a table and a bed in my room.
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识读下图，回答问题：
