Do you have any family members or friends who live abroad? Now many people come to China to look for the roots of their families. They____come from the United States, Canada, England and Germany. Mrs. Sun is a Chinese woman, and she has lived abroad for fifty years. Her father is a Chinese farmer. He died when Mrs. Sun was only seven years old. She was taken by her uncle to America and has lived abroad ____.

    She is a famous singer now in America. Every time she____in public, thousands of her fans never miss the chance to see her. She often says she is in search of her ancestors' roots. She has never forgotten her____. She hopes that she will be able to go back to her hometown____ and visit some other relatives.

某校研究性学习小组，从汽车市场上随机选取了M辆纯电动乘用车，根据其续驶里程R（单次充电后能行驶的最大里程）作出了频率与频数的统计表：