会计软件必须以账务处理为核心,因而各功能模块不能相对独立。
参考答案:错
—Where is Ted?
—________. [ ]
A. He's American
B. He's 12
C. He's over there
D. They're
保安系统提供三个层次的保护:外部侵入防范、区域保护、目标保护。