一.什么是用戶分層? 用戶分層是以用戶價值(比如說:活躍用戶、高價值用戶)為中心來進(jìn)行切割的嗜憔,在同一分層模型下,一個用戶只會處于一個層次中呜象。還有一種說法是用戶分群呼寸,它是以用戶...
一.什么是用戶分層? 用戶分層是以用戶價值(比如說:活躍用戶、高價值用戶)為中心來進(jìn)行切割的嗜憔,在同一分層模型下,一個用戶只會處于一個層次中呜象。還有一種說法是用戶分群呼寸,它是以用戶...
原材料引用(Material): Twenty-two percent survived with good brain ability. Only ten percent ...
原材料引用(Material): The researchers say any kind of CPR improved chances of the patient's ...
原材料引用(Material): 712 received CPR壶愤,439 received chest presses only. No mouth-to-mouth re...
原材料引用(Material): In all the cases, witnesses saw the event happen.More than one thousan...
原材料引用(Material): Doctors in Tokyo led the research. It examined more than four thousand...
原材料引用(Material): The study was published in the British medical magazine, The Lancet. e...
原材料引用(Material): However, a new Japanese study questions the usefulness of mouth-to-mou...
原材料引用(Material): CPR keeps blood and oxygen flowing to the heart and brain. si-pi-ɑr ki...
原材料引用(Material): CPR combines breathing into the victim's mouth and repeated presses on...
原材料引用(Material): Without lifesaving measures, the brain starts to die within four to si...
原材料引用(Material): The heart stops pumping blood. The person stops breathing. e?hɑrtstɑps...
原材料引用(Material): The condition is called cardiac arrest. e?k?n?d???n?zk?ld?kɑrdi??k??r?...
原材料引用(Material): Cardiopulmonary resuscitation, or CPR, can save the life of someone wh...
原材料引用(Material): This is the VOA Special English Health Report. e?s ?z e? vi?-??-e? ?sp...