问题
选择题
What disappointed _____ Chinese most is that the national football team was kicked out of the Asian Cup
_____ second time, with four points from three matches. [ ]
A. the; a
B. 不填; a
C. the; the
D. 不填; the
答案
答案：A
)=c(Cl-)时,用含a的代数式表示NH3·H2O的电离常数Kb= 。