【判断题】组呼采用全双工方式,是指在事先编组的情况下,允许一个用户与一组用户建立一个对多个的通话。
【单选题】心肌与骨骼肌的兴奋-收缩耦联的关键离子都是( )
【单选题】测量尿蛋白定量时,需要加入的防腐剂是( )
【多选题】Name the factors in a removal approach of BOD5 by the activated sludge process.
A.
Mixed liquor suspended solids (MLSS)
E.
BOD5 removal efficiency
F.
The temperature of the mixed liquor
G.
The pH value of the mixed liquor