【简答题】An acid reacts with a base to produce a salt and water. Hydrogen from the acid combines with ( ) from the base to form water molecules.
【简答题】An acid reacts with a base to produce a ( ) and water. Hydrogen from the acid combines with hydroxide from the base to form water molecules.
【单选题】—I don't feel like going out. Why don't we watch TV at home? — ______ You promised to take me out for dinner.
【单选题】下列因素中,不会引起甲状腺大部切除术后呼吸困难和窒息的是