1.原材料引用（Materials）
More than one thousand of the victims received some kind of medical assistance from witnesses. Seven hundred and twelve received CPR. Four hundred and thirty-nine received chest presses only. No mouth-to-mouth rescue breaths were given to them. The researchers say any kind of CPR improved chances of the patient's survival. But, they said those people treated with only chest presses suffered less brain damage. 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）
3.感受和评价（Commens）
1.升调降调很重要，要仔细去识别然后模仿
2.of 好像存在很多与前面单词连读的情况
3.在这一个小时中，常常有想休息，想放弃的，想开小差的冲动，这很真实反映了平时我做事的状态，不过平时都是放任自流了，现在懂得了保持克制，战胜自己的感觉真好。
4.统计累计的练习小时数（Hours）
累计1+1=2小时
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