Which of the following compressions in the soil under loading cannot be ignored（） A: soil particles B: interparticle pore C: sealing gas D: water in the soil

You need to perform CPR on your neighbour after she collapsed and stopped breathing. How many chest compressions to rescue breaths should you do?

Cardiopulmonary resuscitation includes three steps: A, B and C, in which a is() A: Artificial circulation B: Artificial respiration C: Open airway D: Chest<br/>Compressions E: As<br/>soon as possible

What is not the Characteristic of good compression? A: Push fast: at least 100 compressions per minute B: Release the chest completely C: Minimize interruptions D: Can maintain normal blood pressure