A.20%—45% B.40%—45% C.40%—65% D.20%—65%
A.二次供水水質(zhì)應(yīng)符合國(guó)家生活飲用水衛(wèi)生標(biāo)準(zhǔn) B.二次供水水箱應(yīng)定期清洗消毒 C.二次供水水箱應(yīng)有衛(wèi)生防護(hù)措施 D.自備水源不必檢測(cè)
A.表面光潔 B.有油漬 C.有水漬 D.有異味