单项选择题
A.35v%,0.8v% B.40v%,0.8v% C.35m%,0.8m% D.40v%,1.0v%
A.25℃ B.0℃ C.60℃ D.20℃
A.11%(质量分数) B.7%(质量分数) C.30mg/L D.10PPm