Which of the following operating systems can be upgraded to Windows 2000 Professional in addition that all systems meet the minimum hardware requirements for the upgrade？（）
- A、Windows NT Workstation 3.5
- B、Windows NT Workstation 3.51
- C、Windows NT Workstation 4.0
- D、Windows 95
- E、 Windows 98
- F、Windows 3.11
正确答案:B,C,D,E,F
答案解析:有
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