The ratio of cardiac compression and artificial respiration was 30:2（)
举一反三
- In one person CPR the compression/ventilation ratio is() A: 15:2 B: 30:2 C: 30:4 D: 50:2
- When 2 people performs cardiopulmonary resuscitation on an adult, the ratio of compression to ventilation is: A: 15：1 B: 15：2 C: 30：1 D: 30：2
- During<br/>adult cardiopulmonary resuscitation, the ratio of chest compression<br/>to ventilation was () A: 30:2 B: 20:2 C: 15:2 D: 30:1 E: 15:1
- For<br/>a given fuel, a change in the compression ratio will affect the<br/>ignition lag by which of the listed means? ____. A: an<br/>increase in compression ratio will increase the ignition lag B: in<br/>increase in compression ratio will decrease the ignition lag C: a<br/>decrease in compression ratio will decrease the ignition lag D: a<br/>decrease in ignition lag will increase the compression ratio
- The higher compression ratio gives a ______thermal efficiency