题目

Kaitlin Riffel’s dream to end poverty(贫困) started when she was visiting her father, who worked for the homeless.“I never realized there were people in the world who didn’t have a home or food before,” said Kaitlin, who is now sixteen. “I knew there was something I had to do about that.”At age eight, she started raising money to build a playground. It took me two years, Kaitlin said. We started small. We wanted to do something to make a difference.”In 2014, When Kaitlin was thirteen, she visited Central America, and saw people going hungry and families living in houses made of如图2所示，主要表示力可以改变物体运动状态的是___________图；主要表示力可以改变物体形状的是____________图.