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搞好消防装备管理是发挥其技术和战术性能的主观需求。
配制质量分数为20%的硫酸溶液400g,需98%、密度为1.84g·cm-3的浓硫酸多少毫升?水多少毫升?
生态系统是指()
城市热岛效应
简要说明刷浆工程施工要点。
被誉为“峰林之王”的保护区是?
根据我国《公益事业捐赠法》,在发生自然灾害时,以下可以作为捐款受赠人的是( )。[2008年真题]
百日咳首选的抗生素是()
中药注射剂安全性检查的项目有哪些?
对少量的煤气泄漏进行修理时,不能采用堵缝(用堵漏胶剂、木塞)或者打补丁的方法来实现。()
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