单选题
发布日期:2021-03-22
removing heat and deposits
neutralizing acidic products
lubricating
improving combustion efficiency
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将触电者与电线分开时,哪种做法是正确的:用干燥的塑料棒挑开电线、用干燥的铁棒挑开电线、用手将电线挑开?
因设备条件限制,确需施行牵引溜放法调车时,无须有安全措施,只要铁路局批准即可。
在运用讲解演示法时,要注意()
配水管道应采用内外壁热镀锌钢管或铜管、涂覆钢管和不锈钢管,其工作压力不应大于( ) MPa。
知识产权的国际保护
时钟故障信息能够通过()接口传输到长沙市轨道交通2号线一期工程集中网管设备,便于轨道交通通信系统的集中管理。
肝肿大病人,于右上腹部听到血管杂音,应考虑( )
急性心肌梗死第1~3天病人活动量是()
主要内容设有80多条问答的著作是()。
同是固体物质,但铝比木材热导性强()倍.
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