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1. A rocket bums propellant rapidly and most rockets carry a supply that last just a few seconds.(1)____
译文：火箭迅速燃烧推进剂，而大多数的火箭携带的补充物仅能维持几秒而已。
2. Industrial buyers are responsible for supplying the goods and services that an organization required for its operations.(2)____
译文：工业买主负责提供企业运作所需的货物和服务。
3.Although it is any longer the big business that it was in the forties,radio continues to be a medium of essential communication, especially at the local level.(3)____
译文：尽管无线电通信行业不再如四十年代那样兴盛，但它仍然是基本通讯的媒介，尤其在地方通讯中。
4. The expansion of adult training programs has resulted partially from the feminist movement, which encouraging women to improve their skills for the job market.(4)____
译文：成人培训课程扩展的部分原因是女权运动，女权运动鼓励女性去提高她们适应就业市场的技能。
n. 活动，运动，移动，[音]乐章
