【单选题】用稀释与接种法测定水样BOD5时,培养后样品中剩余溶解氧质量浓度不小于 ( )mg/L。
【单选题】In his essay 'The Parable of the Tapeworm,' Mario Vargas Llosa argues that at the heart of the writer's will to write is rebellion, a 'rejection and criticism of life as it is.' Moreover, he speculate...
A.
both of them are portable.
B.
both of them are difficult to govern.
C.
both of them can be used in rebellion.
D.
both are them are highly influential.
【单选题】稀释与接种法测定水中BOD 5 时,下列水样应进行接种的是( )。
【单选题】稀释与接种法测定水样中BOD5时,对稀释水的要求错误的是( )
E.
稀释水BOD5的测定结果不超过0.5mg/L
【简答题】稀释与接种法测定水中BOD5时,如水样为含难降解物质的工业废水,可使用()的稀释水进行稀释。
【单选题】In his essay 'The Parable of the Tapeworm,' Mario Vargas Llosa argues that at the heart of the writer's will to write is rebellion, a 'rejection and criticism of life as it is.' Moreover, he speculate...
A.
both of them are portable.
B.
both of them are difficult to govern.
C.
both of them can be used in rebellion.
D.
both are them are highly influential.
【单选题】网络服务提供者和其他企业、事业单位在业务活动中收集、使用公民个人电子信息时,应当遵循的原则中不包括()
【单选题】用稀释与接种法测定水样BOD5时,若样品中含有硝化细菌,需在试样培养液中加入( )。