单选题
发布日期:2021-03-22
Safety helmets
Buoyance aids
Breathing apparatus
Immersion suits
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氟试剂分光光度法测定水中氟化物时,混合显色剂由氟试剂溶液、缓冲溶液、丙酮及硝酸镧溶液按()体积比混合而得,临用时现配。
评估部门复核人员不得兼职()工作。
关于印度佛窟,下面说法正确的是:()
建设工程项目质量保修期从()开始起算。
根据风险评估结果,采用相应的控制措施,将风险控制在可承受范围之内。指私募基金管理人内控要素的()。
高压不对称脉冲轨道电路适用于站内、也适用于非自动闭塞车站()区段的不对称高压脉冲轨道电路,但不适用于驼峰溜放部分的道岔区段。
已知△ABC中,,以BC边上的高AD为折痕,使△ABD和△ACD折成相垂直的两个面(如下图所示),求平面ABD与平面ABC所成二面角D-AB-C的度数.
资金结算网络的服务渠道不包含以下哪一种()。
参加合同谈判,处理合同执行过程中的问题的措施属于组织措施的范畴。
救护队参加实施震动爆破措施时,爆破30min后,救护队携带氧气呼吸器进入工作面检查,发现爆破引起火灾应立即灭火。
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