The acceptable coliform (大肠杆菌) counts for fecal (粪便) contami
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
■.one/100ml of water
■.one hundred/100ml of water
■.one thousand/100ml of water
■.none
可能相似的问题
-
1年前1个回答
-
1年前2个回答
-
1年前1个回答
-
1年前1个回答
-
1年前1个回答
-
1年前1个回答
你能帮帮他们吗