单选题According to the passage, a large number of children can be saved only when ______.A the life-saving ways are medically effectiveB their parents are rich enough for the life-saving techniquesC the life-saving techniques are easy to useD their parents l
题目
单选题
According to the passage, a large number of children can be saved only when ______.
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