A.≤1mg/l
B.≤5mg/l
C.≤10mg/l
D.≤15mg/l

A.酸浓为2mg/l
B.酸浓为2g/l
C.溶液中H⁺浓度为10^-2M
D.溶液中H⁺浓度为10²M

A.VO₂、K₂SO₄、SiO₂
B.V₂O₅、K₂SO₄、SiO₂
C.V₂O₅、K₂O、SiO₂
D.V₂O₅、K₂SO₄、MgO

A.硫酸蒸汽
B.水蒸汽
C.SO₃
D.A＋B＋C

A.0.01%
B.0.001%
C.0.0001%
D.0.00001%

A.＋1.8℃
B.0℃
C.－15℃
D.－27℃

A.98.0%
B.98.3%
C.98.5%
D.100%

A.FRP
B.PVC
C.铅
D.碳钢

A.碳钢
B.F4
C.铅
D.玻璃

A.高
B.低
C.相等
D.不一定

A.98.1%
B.98.2%
C.98.3%
D.98.4%