题目内容
(请给出正确答案)
[单选题]
混凝处理包括混合和反应二个阶段,其中混合阶段搅拌方式和时间分别为()
A.慢,10~30s
B.快,20~30min
C.慢,10~20min
D.快,10~30s
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A.慢,10~30s
B.快,20~30min
C.慢,10~20min
D.快,10~30s
A.速度梯度在500~1000s1,搅拌时间为10~30s
B.速度梯度为500~1000s1,搅拌时间为1~30min
C.速度梯度在10~200s1,搅拌时间为10~30s
D.速度梯度在10~200s1,反应时间为10~30min
A、速度梯度为500~1000s-1,搅拌时间为10~30s
B、速度梯度为500~1000s-1,搅拌时间为1~30min
C.速度梯度为10~200s-1,搅拌时间为10~30s
D.速度梯度为10~200s-1,搅拌时间为10~30min
A.反应慢、精确性低
B.反应慢、精确性高
C.反应快、精确性低
D.反应快、精确性高