软件(结构)设计阶段产生的文档是______。
A.程序流程图
B.系统功能说明书
C.系统模型说明书
D.模块结构图和模块说明书
参考答案:D
They have to go back home because they ______ all their money. [ ]
A. were spending
B. have spent
C. have paid
D. cost
白血病高热的主要原因是()
A.疾病本身可引起发热
B.代谢旺盛所致
C.继发感染
D.贫血后基础体温升高
E.以上都不是