A:Na2SO3溶液中存在: c(Na+)>c(SO32−)>c(H2SO3)>c(HSO3−)
B:已知NaHSO3溶液pH<7,该溶液中: c(Na+)>c(HSO3−)>c(H2SO3)>c(SO32−)
C:当吸收液呈中性时: c(Na+)=2c(SO32−)+c(HSO3−)
D:当吸收液呈酸性时: c(Na+)=c(SO32−)+c(HSO3−)+c(H2SO3)
要使一根镍铬合金线接入电路的电阻变大,可采用的方法是( )
The woman has no arms,but she can write and draw with her feet and mouth.