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Since my mother moved to live with us in the city, she has been much heavier than before. As time went by, her health got1. So I had to take her to see a2. My mother was told to lose weight by doing exercise every day. She had no choice but to follow3the doctor said. I told her that I would exercise with her every morning.
On the first morning, she got up very early4ran with me in our neighborhood. I tried to run slowly so that she could follow me. After5for some minutes, I told her the proper ways of exercise and the importance of eating healthy food. She listened to me carefully. It made me6that she told me everything very patiently when I was a kid. On the second morning, I praised her for keeping running with me.
But after two weeks, she wanted to7running because she thought the two-week exercise didn't work at all. To encourage her, I taught her how to use the facilities (设施) for exercise in our8. She began to exercise again.
With my help, it9her one month to develop a good habit of daily exercise. "Thank you, my dear daughter. Exercise brings health and happiness to me. I will10worry about my health." Her words touched my heart deeply. I felt happy to make a big difference to my mother's life.
为
外接圆的直径，
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的平分线交
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三点是否在以
为圆心，以
为半径的圆上？并说明理由.
