已知HF的电离程度大于等浓度的CH3COOH的电离程度,则在相同条件下,同浓度等体积的NaF、CH3COONa溶液中,离子总数()
I tried phoning her office, but I couldn’t _______.
His sister left home in 1998, and _______since.
What do you mean, there are only ten tickets? There _____ be twelve
Could I speak to ______ is in charge of International Sales please?
How much _______ she looked without her glasses!