What is cardiopulmonary resuscitation ?

How many kinds of CPR are there?What are they, respectively?

A. One type is the use of “hands and month breathing CPR”.
B. The other type is the use of “Hands-Only CPR”.

When is CPR needed by the patient?

CPR is not difficult to learn. Everyone can learn and apply to it.

A. 对
B. 错