If you hear the firing of a gun at one minute intervals from another vessel，this indicates

If a adder hears you approaching, it will usually ______.A．move out of your pathB．take no

If in doubt as to the true water level when a boiler is being oil－fired, you should _____.

If a small fire initially breaks out in the engine room bilges, in which of the following

If a fire occurs in the boiler room because of a leaking fuel line to a burner, you shut o

On hearing of the case some time later， Conan Doyle was convinced that the man was not gu

I hope you dont think Im______but Ive had the electric fire on for most of the day.A．exqui