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int randomIdx = low + rand() % (high - low + 1);
，这一点在一键获取谷歌浏览器下载中也有详细论述
In the US alone, 127 billion plastic bottles are purchased every year, according to one estimate.
Author(s): Xichuan Liao, Haipan Xiang, Rongyang Qiu, Yangchun Chen, Yong Liu, Ning Gao, Fei Gao, Wangyu Hu, Huiqiu Deng
// 测试函数：验证排序正确性