【单选题】【消耗次数：1】
数控装置在硬件基础上必须有相应的系统软件来指挥和协调硬件的工作，两者缺一不可。数控装置的软件由()组成。
①
控制软件
②
管理软件和控制软件两部分
③
管理软件
④
计算软件
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相关题目
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交换机的组成结构与计算机类似，由硬件和软件两部分组成，其硬件部分中（ ）类似计算机中的BIOS，用来存储bootstrap指令、基本诊断软件和精简IOS。
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ROM(只读存储设备)
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NVRAM（非易失性随机存储器）
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it isn’t likely
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it can’t be true
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I would rather not
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I don’t think I know you
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have walked
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had walked
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were walking
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walked
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feeling
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idea
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sense
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opinion
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north; to the east
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north; east of
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to north; east of
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should
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must
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shall
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set about
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that
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which
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the one
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the one what