A.藻類B.累枝蟲C.豆形蟲D.線蟲
A.1000~1500mg/LB.1500~2000mg/LC.2000~3000mg/LD.3000~4000mg/L
A.0.1~0.3B.0.4~0.5C.0.7~0.8D.1.0~1.2