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【单选题】
在我国,国有经济拥有雄厚的经济实力和先进的技术设备,积聚着我国最先进的生产力,控制着国民经济的命脉。下列不属于国民经济的命脉行业是:()
A.
涉及国家安全的行为,如国防工业,造币工业、航空航天工业等
B.
提供重要公共产品的行为,如大江大河的治理,重点防护林工程、重点公益事业等
C.
支柱产业和高新技术产业中的重要骨干企业,如机械工业、电子工业、汽车工业、石油化工、建筑业等
D.
第三产业,纺织印染业、旅游业、服装设计等
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【简答题】IP 地址分为 A 、 B 、 C 、 D 、 E 五类,若网上某台主机的 IP 地址为 1 20.195.128.11 ,该 IP 地址属于( )类地址。
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