1. 选基准：随机选一个元素作为基准(pivot)
新中国成立后，葛洲坝、三峡大坝等大型工程逐步建设，几十万宜昌人民离开故土，搬出库区。他们舍小家、为大家，重新扎根开花，就像蜡梅一样昂扬生长。
，这一点在同城约会中也有详细论述
carrier or modem systems to accommodate remote ATMs), a communications facility
He said it was hoped the scheme could be expanded into island-wide services, with the pilot offering health and care services "a blueprint" to roll it out in other areas.