Without lifesavingmeasures, the brain starts to die within four to six minutes. CPR combines breathing into the victim's mouth and repeated presses on the chest. CPR keeps bloodand oxygen flowing to the heart and brain. However, a new Japanese study questions the usefulness of mouth-to-mouth breathing.

      今天复习的同样是句子和音标，句子里的measure  combines  presses  oxygen 这四个单词计较难发，总是把音标发错，r发成ch  把a的音发成i的音 好在以前复习的时候有所改正，今天在读起来也没有什么困难的。 

    以后会更加努力，明天继续复习，过了明天又要早起了。时间也已经过了一半了。收获的也不少了，我也能感受到我的成长。我会更加努力