单选题
发布日期:2021-03-22
compressors
forced fans
ventilators
generators
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我国第八次基础教育课程改革倡导自主学习、合作学习和探究学习,简述你对这三种学习方法的理解。
称重传感器固定地安装在衡器上,力总是以相同方式引入。
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目前CDMA手机支持的认证方式有:()
各级施工安全监督检查人员发现严重“两违”、存在重大安全隐患、现场失控的施工点和个人,可根据规定提出经济考核和处罚建议。
冷却系的作用是使发动机在启动时能很快升温,并及时将受热件的热量散出大气以保证发动机在()下工作。
全肺切除术后放置胸腔闭式引流的目的是()。
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