原材料引用： However ,a new Japanese study questions the usefulness of mouth-t...

原材料引用： CPR keeps blood and oxygen flowing to the heart and brain. 信息与事实：...

原材料引用: Without lifesaving measures, the brain starts to die within four ...

原材料引用: The heart stops pumping blood .The person stops breathing. 信息与事实:...

原材料引用: Cardio-Pulmonary Resuscitation or CPR can save the life of someon...

原材料引用: The Candition is called cardiac arrest. 信息与事实: /ʃ/、/ʒ/、/k/ /ʃ/ 发音...