单选题If the engine of a survival craft does not start，check to see（）.Athat the fuel valve is openBif the air supply system is openCif the water sprinkler system is openDif the limit switch is on
单选题
If the engine of a survival craft does not start，check to see（）.
A
that the fuel valve is open
B
if the air supply system is open
C
if the water sprinkler system is open
D
if the limit switch is on
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