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【单选题】
23-2. UNIX操作系统最初是由( Bell实验室)推出的,它属于( B )类操作系统。
A.
（1）单用户单任务；
B.
（2）单用户多任务；
C.
（3）多用户单任务；
D.
（4）多用户多任务。
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查看完整题目与答案
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【多选题】营运资金的管理是企业财务管理工作的一项重要内容,营运资金的管理原则包括( )。
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满足合理的资金需求
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She wanted to use her fame to help starving children in Africa.
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