A. 要确定预期的输出结果 B. 尽量测试自己的程序 C. 检查程序是否做了不该做的事情 D. 要进行破坏性的测试
A. 模块结构图 B. E-R图 C. 程序流程图 DFD
A. 系统中相互关联的实体 B. 系统外与系统关联的实体 C. 系统中相互作用的程序模块集合 D. 系统中相互关联的数据集合
A. lots of people were walking along the street B. there were lots of people in the street C. Steve saw that there were lots of people in the street D. the street was crowded with lots of people