A.75%
B.81.25%
C.85%
D.78%
A.75%
B.81.25%
C.85%
D.78%
A.80%
B.85%
C.88.89%
D.90%
A.85%
B.90%
C.95%
D.98%
A.70%
B.90%
C.50%
D.30%
A.(1-进水浓度/出水浓度)×100%
B.(1-出水浓度/进水浓度)×100%
C.(进水浓度-出水浓度)/进水浓度×100%
D.(进水浓度-出水浓度)/出水浓度×100%
E.(出水浓度-进水浓度)/进水浓度×100%
A.氯气
B.氧气
C.高锰酸钾
D.过氧化氢
A.80%
B.85%
C.89%
D.95%
A.10~20
B.20~30
C.30~60
D.65~95
A.200mg/L
B.300mg/L
C.500mg/L
D.600mg/L