In the experiment of respiratory movement regulation, the correct
connection mode of CO2 airbag is ()
A.Directly connected to the side tube of tracheal canula
B.Gradually approach the side tube of tracheal canula until the
respiratory curve changes significantly
C.Stay away from the side tube of the tracheal canula by more than 5cm
to avoid inhaling too much CO2
D.Insert directly into the rabbit's nasal cavity
E.Connect directly to the breathing transducer