【单选题】【消耗次数：1】
计算机的软件系统分为
①
程序和数据
②
工具软件和测试软件
③
系统软件和应用软件
④
系统软件和测试软件
参考答案：
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【简答题】
根据软件的用途，计算机软件一般分为系统软件和[填空1]两大类。
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