1.原材料引用（Materials）
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 chest presses in two thousand five.
2.信息和事实（Facts）
看着音标，然后听录音，然后跟读，这样会提高你对于音标的敏感程度。
3.感受和评价（Commens）
练习是成功的唯一途径
4.统计累计的练习小时数（Hours）
0.5h
