Course directed by the OSC or CSS to be steered at the beginning of a search is（）.

Changing rescuers while carrying out artificial respiration should be done（）.

A.without losing the rhythm of respiration
B.only with the help of two other people
C.by not stopping the respiration for more than 5 minutes
D.at ten-minute intervals

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An uncontrolled flow of gas，oil，or other well fluids into the atmosphere is called a（）.

A.Flow
B.Breakout
C.Kick
D.Blowout

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