单项选择题
A.due to
B.owing to
C.results from
D.results in
单项选择题 When considering the lowest fuel system operating temperature, （） are important.
单项选择题 （） is the temperature at which a liquid fuel gives off sufficient vapor to form an ignitable mixture near its surface.
单项选择题 A combination combustible gas and oxygen indicator is an instrument that measures the（） of both combustible gas and oxygen; each is indicated on a separate meter.