The way of digester mixing: ( ). A: The digester gas is compressed and injected into the liquid through lances or diffusers. B: Mechanical mixers, usually slow speed turbines, create liquid motion inside the digester. C: A combination of above three ways. D: The liquid contents are recirculated by pumping them from one location to another.
The way of digester mixing: ( ). A: The digester gas is compressed and injected into the liquid through lances or diffusers. B: Mechanical mixers, usually slow speed turbines, create liquid motion inside the digester. C: A combination of above three ways. D: The liquid contents are recirculated by pumping them from one location to another.
为什么加油时燃油进入油箱前会经过一个散射器（DIFFUSERS）？（） A: 因为要减缓燃油喷溅进油箱时的速度 B: 因为要燃油平均的分配到油箱各角落内 C: 因为要减低加油管路中的压力 D: 因为要让加油管路保持一定的压力
为什么加油时燃油进入油箱前会经过一个散射器（DIFFUSERS）？（） A: 因为要减缓燃油喷溅进油箱时的速度 B: 因为要燃油平均的分配到油箱各角落内 C: 因为要减低加油管路中的压力 D: 因为要让加油管路保持一定的压力
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