Final answer:
In two-rescuer adult CPR, the recommended compression to ventilation ratio is 30:2, with emphasis on providing high-quality chest compressions.
Step-by-step explanation:
In two-rescuer adult CPR, the recommended compression to ventilation ratio is 30:2. This means that for every 30 compressions, you should give 2 ventilations. Compressions should be performed at a rate of at least 100 compressions per minute, with a depth of at least 5 cm. The emphasis in CPR is on providing high-quality chest compressions to maintain blood flow and oxygenation.