A. Finishing B. Finished C. Finishes D. Finish
A. 程序就是软件 B. 软件开发不受计算机系统的限制 C. 软件既是逻辑实体,又是物理实体 D. 软件是程序、数据和相关文档的集合
A. ticked B. ticking C. ticks D. tick
A. under B. by C. in D. beyond
A. through B. in C. of D. on