单项选择题
A.20~30℃ B.20~32℃ C.22~32℃ D.26~33℃ E.25~36℃
A.1次/日 B.1次/周 C.1次/月 D.1次/季度 E.1次/2周
A.250mg/L,30min B.500mg/L,30min C.250mg/L,60min D.500mg/L,60min E.500mg/L,45min