费用按经济用途可分为生产成本和期间费用，下列费用中，属于生产成本的是（）。A．财务费 B．材料

● (74) is a single-user multi-task operating system．

(74)

A． MS-DOS

B． Windows

C．UNIX

D．Linux

● (74) is a single-user multi-task operating system．

(74)

A． MS-DOS

B． Windows

C．UNIX

D．Linux

Windows versions before Windows 95 ().

A、are proprietary

B、are not operating system at all

C、rely on DOS as the operating system

D、were the first successful graphical operating system

A．shutdown -d

B．shutdown -s

C．shutdown -m

D．shutdown -Fr -s 1

A、Router Operating Sytstem

B、Request of Service

C、React Operating System

D、Robot Operating System

A．A.Router Operating Sytstem

B．B.Request of Service

C．C.React Operating System

D．D.Robot Operating System

A、Does your software integrate with the operating system？

B、Does your software contain the operating system？

C、Does your software integrate the operating system？

A、Disk、Operating、System

B、Daily、Operating、System

C、Disk、Open、System

D、Date、Open、System