单项选择题
A．The child clears its body of bacteria. B．The body loses liquids without any control. C．The child has diarrhea in a developing country. D．The body controls its fluid levels.
A．keep sugar and salt in water B．drink it as often as necessary C．take it as much as possible D．use it to kill the bacteria
A．the life-saving ways are medically effective B．their parents are rich enough for the life-saving techniques C．the life-saving techniques are easy to use D．their parents learn the life-saving techniques