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系统数据备份,是指对与用户个人相关的一些应用数据的备份。
宜包煎的药材是()。
1997年被国家旅游局评为“中国旅游行业标志性建筑”的是:( )。
硫酸铜溶液配制时所使用的硫酸铜结晶化学纯度为()
当有六级及六级以上大风和雾、雨、雪天气时,应停止脚手架搭设与拆除作业。雨、雪后上架作业应有防滑措施,并应扫除积雪。()
下列关于Bellman-Ford算法的说法正确的是().
《旅游法》共( )条。
支柱护坡距边坡坡底1m处应设置()的泄水孔。
在金电解槽上方安装排风罩,将金电解过程中产生的氯气、氯化氢抽排,并用()吸收。
知识灌输的方式有()
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