The acceptable coliform (大肠杆菌) counts for fecal (粪便) contamination (污染) according to U.S.standards at beaches (海(湖、河)滩) is:()■.one/100ml of water■.one hundred/100ml of water ■.one thousand/100ml of water ■.none

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/28 03:40:36
xJ@_eKRLYHvmx+(R(VĪPEm4R wq3o?A@3~B! L7WUs"`d>SQ3s}n-z 2~Zg+ ֟y};fh{ %Go NV+M@Dpe✇(|c\6q^ /xۯmp尒0sGb.CQro<׋j|g.+<_+]M