系统停车后电解槽投极化（）

A.400—600mmH₂O
B.600mmH₂O
C.400mmH₂O
D.700mmH₂O

A.55%
B.60%
C.55—65%
D.65%

A.32%
B.33%
C.32.5%
D.32%—32.5%