6. The flash point is used for the division between non-volatile and volatile liquids. What flash point is the criterion to determine it?
(A) 35 degrees Celsius.
(B)37.8 degrees Celsius.
(C) 46 degrees Celsius.
(D) 60 degrees Celsius.
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統計: A(119), B(190), C(54), D(375), E(0) #1900556
統計: A(119), B(190), C(54), D(375), E(0) #1900556