The basic training in fire prevention and fire fighting should include the practical elements which should allow the trainees to acquire the ability to （）.<br>A:use self-contained breathing apparatus<br>B:use various types of portable fire extinguishers<br>C:effect a rescue in a smoke-filled space wearing breathing apparatus<br>D:All of the above

The basic training in fire prevention and fire fighting should include the practical elements which should allow the trainees to acquire the ability to （）.
A:use self-contained breathing apparatus
B:use various types of portable fire extinguishers
C:effect a rescue in a smoke-filled space wearing breathing apparatus
D:All of the above

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