A. The man needs help to change his schedule. B. The man is looking for a job in the morning. C. The man is trying to get a student loan.
单项选择题During heavy exercise, electrolytes are lost in sweat. These electrolytes must be () to keep the electrolyte concentrations of the body fluids constant.
A. retained B. reduced C. returned D. replaced
单项选择题Coconut water is a natural isotonic beverage, with the same level of () as we have in our blood.
A. medical saline B. electrolyte balance C. blood plasma D. intravenous fluid