冬练三九（12）

Seven hundred and twelve received CPR .four hundred and thirty-nine received chest presses only .No month-to-month rescue breaths were given to them.

对前面学过的还是有点淡忘了，还是需要及时复习，多读一读。

那就按照自己的节奏坚持下去吧，加油

累积练习半小时