单选题The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its （）.Aboiling pointBflash pointCviscosity pointDtoxic point
单选题
The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its （）.
A
boiling point
B
flash point
C
viscosity point
D
toxic point
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