（50）__________ 查看材料
A. So far， we have not known exactty yet whether mouth-to-mouth breathing is really useless in CPR.
B. Only ten percent of the victims treated with traditional CPR survived with good brain ability.
CPR keeps blood and oxygen flowing to the heart and brain.
D. His studies show that many people do not want to perform. mouth-to-mouth breathing on a stranger for fear of getting a disease.
E. It said people should increase the number of chest presses from fifteen to thirty for every two breaths given.
F. No mouth-to-mouth rescue breaths were given to them.
土方回填压实的工艺流程为()
A. 填方土料处理→基底处理→分层回填压实→对每层回填土的质量进行检验，符合设计要求后填筑上一层
B. 基底处理→填方土料处理→分层回填压实→对每层回填土的质量进行检验，符合设计要求后填筑上一层
C. 填方土料处理→分层回填压实→基底处理→对每层回填土的质量进行检验，符合设计要求后填筑上一层
D. 基底处理→分层回填压实→填方土料处理→对每层回填土的质量进行检验，符合设计要求后填筑上一层
在对流动人口的管理上，下列哪一项不是公安机关的主要责任：()。
A. 办理暂住户口登记，签发和查验“暂住证”
B. 对出租房屋、施工工地、路边店、集贸市场、文化娱乐场所等流动人口的落脚点和活动场所进行治安整顿和治安管理
C. 依法严厉打击流窜犯罪活动，建立健全社会治安防范网络
D. 打击车站、码头、火车、汽车、轮船上的违法犯罪活动
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