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【简答题】
操作系统(Operating System,简称OS)是最重要的系统软件,它___和___计算机系统软件和硬件资源,提供用户和计算机操作接口界面,并提供软件的开发和应用环境。
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举一反三
【单选题】A deadweight loss ________.
A.
is created when firms underproduce the good but not when they overproduce the good.
B.
is a loss to producers of the good but not a loss to consumers
C.
is a loss to consumers and a gain to producers
D.
is a loss to the entire society
【简答题】Darwin was convinced that the loss of these tastes was not only a loss of happiness, but might possibly be injurious to the intellect, and more probably to the moral character.
【简答题】(50) Darwin was convinced that the loss of these tastes was not only a loss of happiness, but might possibly be injurious to the intellect, and more probably to the moral character.此处译文为：
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