题目

阅读理解Welcome to the pumpkin weigh-off at Half Moon Bay (半月湾), California. The event has always been very popular among most pumpkin growers. Thousands of people line up along the city's High Street and watch the proud pumpkin owners from across the country. Each pumpkin is carefully picked up by forklifts (叉式升降机) and placed on a digital weighing scale.Organizers are offering $30,000 in total prize money for a new record pumpkin entering Half Moon Bay. But in order to receive the New Record Prize， the grower will have to bring a pumpkin heavier than the 2,624-pound one 9. 一根弹簧原长10 cm,在它下端挂一个0.98 N的钩码，弹簧长度为12 cm ,如果在测量范围内再挂两个同样的钩码，此弹簧的长度是 ()   A. 12 cm   B. 16 cm   C. 13 cm   D. 14 cm