单项选择题

A petroleum liquid has a flash point of 135°Fahrenheit. This liquid is classed as a grade （）.

A.B flammable liquid
B.C flammable liquid
C.D combustible liquid
D.E combustible liquid

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A.permits the passage of vapor but not of flame
B.prevents the passage of flammable vapors
C.prevents inert gas from leaving a tank
D.permits vapors to exit but not enter a tank

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（）shall be provided in every cargo tank and slop tank in accordance with the appropriate Resolutions.

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A.Evaporation
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