A.<3個/100ml B.0個/100ml C.0個/1000ml D.<100個/100ml E.<100個/1000ml
A.1.0~2.0L B.2.0~2.5L C.2.5~3.0L D.3.0~3.5L E.2.0~3.0L
A.Cp點(diǎn)是溶解氧的最低點(diǎn),在此之前復(fù)氧大于耗氧 B.Cp點(diǎn)是溶解氧的最低點(diǎn),在此之前耗氧大于復(fù)氧 C.Cp點(diǎn)是溶解氧的最低點(diǎn),在此之后耗氧大于復(fù)氧 D.Cp點(diǎn)若是高于衛(wèi)生標(biāo)準(zhǔn),則水質(zhì)受到污染 E.Cp點(diǎn)的衛(wèi)生標(biāo)準(zhǔn)是5mg/m3