學(xué)習(xí)材料：
Twenty-two percent survived with good brain ability.Only ten percent of the victims
treated with traditional CPR survived with good brain ability.
The American Heart Association changed its guidelines for CPR chestpresses in two
thousand five.
還有練習(xí)"English"的發(fā)音憔辫。
加油你稚，謝謝S
